STOP!

The software in your last post says nothing about DPI! All I see is "pixels/inch", PPI!

PPI vs DPI: What’s the Difference and Why It Matters to Photographers

@JoEtzold; and one more thing to point out to you - my OP, I am not working with JPG, my output from Poser is PNG
We have only brought JPG into the topic as "Document Size" comparison as cameras output JPG or RAW in higher end camera.
I work with PNG or PSD format (sometime TIFF) to keep the higher resolution that is lost when compressing into JPG.
So again: Document Size (media size & Dpi) are the print quality of any given Pixel Dimension.
I bring this up as I was looking at your referred to links - they do not seem to address the Print Resolution of a given JPG.
For Document Size & Resolution it does not matter the Format of the Image: If I have a 180dpi 4x5 Document Property set on an image, I can save it as PNG, TIFF, PSD, or JPG and it will open in any other Image Editor as THAT size and and dimension. (Except for Poser, for Poser will calculate it back down to Dpi of 72 and what ever document size that correlates to the given Pixel Dimension.....hence the "oh bother")

Now I'm upset cause the renderosity software has eaten up again a fine answer post of me. It's the second time and I have no interest in redoing that every time twice.

And also this complete thread is much more than a academic excourse for a truely simple and trivial thing and much more than I have ever thought about DPI and that stuff my whole life long.

And no fear about my programs. They are all fine may be a bit old the one or other but fully fit on work. But I have none changed in DPI setting. No need for that and so they all start with 72 DPI by default. As also the Canon EOS 2000D there no setting is given to change the standard 72 DPI. I just had a look into the official handbook. And why should I fiddle with DPI. As far as the original pixel size keeps untouched you can work and manipulate as much as you want in e.g. Photoshop. First at the end you need to decide what and where to output and then DPI together with paper size is important.

So for me this is working absolutely perfect and I have no need for printing lots of different pictures automatical. B.t.w. most image formats are not storing DPI as original part of their specification but in between in the so called metadata (e.g. EXIF) and from there they can be read again as far as a program is capable using such metadata. For example even Photoshop CS2015 is killing those metadata from a file if you use "save as ... " and no DPI is anymore. (have a look to the Photoshop forums at Adobe)

adp001 posted at 3:08 PM Fri, 17 September 2021 - #4427633

STOP!

The software in your last post says nothing about DPI! All I see is "pixels/inch", PPI!

PPI vs DPI: What’s the Difference and Why It Matters to Photographers

Okay, PPI if you wish - just keep in mind that Printers do not print "pixels", Printers print 'dots'; ie; the value is labeled "Resolution". Therefore in the Document size the terms PPI and Dpi are interchangeable.
My issue when I posted was that Poser is not writing OUT what the operator writes IN.
However, despite whatever issues JoEtzold may have about the description; Poser's 'Export Image' function is not keeping true to the inputs it is given.

I am done with this thread, as JoEtzold has said; he is not interested in this and no intention of printing out lots of different pictures automatical - if this is not something you use Poser for then why get upset because someone else might.
I don't print Comic books but I will not get "upset" if someone who does opens a conversation about doing so with Poser.

In closing; my solution has been found in JoEtzold's pointing out the "Resample" function of post editor software. All the rest of the bickering here is mute and the "trivials of DPi" would indeed be a topic for the 2D software threads.
(**bottom line: Poser not fully saving out what was fed in, one extra step in a 'print' workflow, no big deal....for me anyway)

igohigh posted at 1:52 PM Tue, 21 September 2021 - #4427811

My issue when I posted was that Poser is not writing OUT what the operator writes IN.

Thats not completely true. Poser is writing out whats his primary task. A correct rendered image in wished pixel dimensions. And up to version 11 it is also writing out eventually given DPI according with paper size in inch or cm or pixel. on your choice. And this last secondary task seems broken in version 12. I can't proof cause I'm waiting to buy Poser 12 until better solution for use of older python scripts is given and most bugs are solved. (Have never installed any Poser version until min. third service pack was out.) I have all that said just checked with test renders in Poser 2014 Pro (thats the version before 11 and 12 so now called 10).

And b.t.w. as I said before mostly all image formats are not writing DPI and such stuff in their original header specification only pixel dimensions. And this is for JPG, PNG and also PSD the same. DPI as also paper sizes if available are stored in the metadata. And thats a problem cause this metadata are not a fully complete standard. There are some parts which are common and DPI and paper size are not in this. Everyone can add further data in that metadata. So on one hand it's not defined wether to write such data nor is it asured that a particular program can and do read them. In first line metadata was thought for information not for operation. That came later and as everytime if doing something not defined fully in the beginning it's a fine part for may be getting troubles.

I have never ever said something against printing lots of images as bulk automatical. I don't do so and I guess most of Poser users also not cause a main theme here around is everytime the reworking of the renders in image manipulation programs. And then it's only one step more to set the correct output size for the given pixel dimensions. And b.t.w. I was not upset about this thread I was upset about renderosity cause one again they puzzle on their internet design and its not bug free. I lost this way two posts and with marking all read doesn't come back to the top level above but have to navigate back.

@JoEtzold ; First let me thank you for pointing out that you are NOT using Poser 12 to support your argument that what we see in Poser 12 is not happening. That makes a whole lot of sense.

Now, I really did think I was going to need to spend this much time for I thought I had given enough information and samples BUT here it goes:

The scene is the SAME, very simple. Only thing I change is the RESOLUTION SIZE in Poser then without changing anything I open the render in Photoshop and take a look at the Document Size.

Now here is what Goes Into Poser 12 and what comes Out (forget about the "Resampling" for I am changing NOTHING)
***Note: Two Renders, Two different RESOLUTIONS asked for but BOTH come out as 72

Now here is Poser 11: Same scene, ONLY changing the RESOLUTION, I change Nothing when I open it in Photoshop.
***NOTE: Poser 11 gives me One 72 Resolution Image and One 300 Resolution image

As the Pixel Dimension are NOT changing, what this tells me is that Poser 12 is rendering at a MAX Resolution of 72 pixels/inch but Poser 11 is rendering the requested 300 pixels/inch ALL with the 640x480 .......or is Poser 11 lying and really only rending both at 72?

So; is ANY version of Poser actually Rendering at resolutions higher then 72 ?? Poser 11 claims that it is, but Poser 12 is saying it can't.

So I will just leave it at this final 'explanation' from the web:

igohigh posted at 7:28 PM Mon, 27 September 2021 - #4428207

So; is ANY version of Poser actually Rendering at resolutions higher then 72 ?? Poser 11 claims that it is, but Poser 12 is saying it can't.

For Poser 2014 Pro I can definitve say it's doing higher DPI than 72. It can be seen with the images contense, sharpness, etc. as also by the increasing render times and the size of the render buckets.

As far as I know Poser 12 is up to this moments not placed as final but as a so called early release. So don't know if and when it becomes final including a python scripts solution and up to that moment 2014 Pro or 11 are the friends.

@igohigh - you need to set the render size in either inches or cm for changing the dpi to have any effect. 

Resolution when rendering is controlled by the total number of pixels in the image.

In the example screens you've posted, the image has the same resolution in both 11 & 12 - 640 x 480 pixels.

That number of pixels can be printed at either 8.888 x 6.666 inches at 72 dpi, or 2.133 x 1.6 inches at 300 dpi.

If you want to print at 8.888 x 6.666 inches at 300 dpi then you need to set that size in the render size dialog and let Poser figure out how many pixels are needed (it's 2666 x 2000, according to Photoshop).

So if you tell Poser what print size and resolution you need it will calculate the number of pixels needed to achieve that. 

If you tell it how many pixels you want you'll have to sort the print size and resolution yourself.

DPI is not rendered, only pixels are rendered.

Seems that poser 12 is clearly broken compared to all the previous versions when it comes to DPI. all previous versions work well and clearly render at the DPI setting not reducing it . You will note this when reducing an image rendered at 300-600 dpi in Poser 11 and reducing it for Web at 72 Dpi that it will loose quiet allot of quality and not be as sharp. Actually it is not the Idea having such an Option in Poser 12 expecting it to work and having to calculate a Increased size to achieve the effective DPI you want to end up with.

Seems Poser 12 will remain for some more years in Pre Release not even the Poser 11.1 SM to Bondware's 11.3 version has ever been finished before the support stopped it just has been dropped with a broken Python engine that needs to be run with a 3rd party fix ! Not a very serious marketing strategy. 

Cyogreem posted at 8:08 PM Tue, 28 September 2021 - #4428258

Seems that poser 12 is clearly broken compared to all the previous versions when it comes to DPI. all previous versions work well and clearly render at the DPI setting not reducing it . You will note this when reducing an image rendered at 300-600 dpi in Poser 11 and reducing it for Web at 72 Dpi that it will loose quiet allot of quality and not be as sharp. Actually it is not the Idea having such an Option in Poser 12 expecting it to work and having to calculate a Increased size to achieve the effective DPI you want to end up with.

Seems Poser 12 will remain for some more years in Pre Release not even the Poser 11.1 SM to Bondware's 11.3 version has ever been finished before the support stopped it just has been dropped with a broken Python engine that needs to be run with a 3rd party fix ! Not a very serious marketing strategy. 

Well at least you seem to see what I am getting at here.
My WHOLE intention here was to Render the Size and Resolution desired for printing so during Postwork I do not have to Enlarge or Reduce the image, thus loosing quality.
*****Lets Drop The "Dpi" as that seems to be confusing the Question - Both Poser and Photoshop show them as Resolution = px/n (pixels per inch)********
(that was my fault for that is the way us print people think "dpi" whereas computer people think in "px/in" - us hardware folk understand the translation but apparently some computer folk find it confusing)

@caisson; If you read back to the beginning - I had done exactly what you have said:
"So if you tell Poser what print size and resolution you need it will calculate the number of pixels needed to achieve that. 

If you tell it how many pixels you want you'll have to sort the print size and resolution yourself."

I told Poser both; What Print Size I want and the number of Pixels" - I had this all worked out ahead of time at the Print End.
- As you can see in the Poser 11 example above (using the 300px/in) P11 did what I requested - there was no need to "sort the print and resolution myself" as P11 gave me two different px/in renders as I aksed it to.
However, Poser 12 ALWAYS changes the px/in (pixels per inch) to 72 no matter what I tell the Render Engine to do.

You said:
"In the example screens you've posted, the image has the same resolution in both 11 & 12 - 640 x 480 pixels."
TRUE, I did so for the whole sake of comparing what the two versions of Poser are doing to the Resolution.
BUT, look again - in both Poser 11 & 12 I made TWO EACH RENDERS; one at 72px/in and one at 300px/in

You said:
"That number of pixels can be printed at either 8.888 x 6.666 inches at 72 dpi, or 2.133 x 1.6 inches at 300 dpi."
Here is where you go off the target - the Target its to Print BOTH 72dpi and 300dpi at 8.88 x 6.666 inches - - my example above should be Two Renders from Each version of Poser. Each version of Poser should have rendered Both 72px/in AND 300px/in ALL at the same 0000 x 0000 size. Only Poser 11 seems to have done this for Poser 12 did Two renders at 72px/in
The 72px/in will be less quality then the 300px/in

So the question is:
Given a Render size of 640 x 480 and render it Twice each using a Different Resolution value (one 72px/in and one 300px/in)
That should give out Two different final renders of Two different Resolutions, right?
A) 640 x 480 at a low resolution of 72px/in
B) 640 x 480 at high resolution of 300px/in

According to my sample: Poser 11 does this but Poser 12 does not.
According to my sample: Poser 12 is rendering both at 72px/in as confirmed by Photoshop
According to my sample: Only Poser 11 is rendering two different resolutions of the same pixel dimension (640 x 480)

**** In Short ****
If I had a 10 inch x 10 inch section of my Monitor with say 3,000 x 3,000 pixels and I view it with 72 pixels per inch then I have 5,184 pixels of color information (resolution), but if I view it with 300 pixels per inch then I have 90,000 pixels of color information and therefore a much higher, clearer, less grainy image. - - DO NOT CHANGE THE 10 in x 10 in

Just a mnemonic as a quotation from the posts of a other user here I came across:

"Never argue with an idiot. They drag you down to their level and beat you with experience!"

Might be a bit heavy and so not my style but going somewhat to the right direction by trend. :-)

igohigh posted at 5:47 PM Wed, 29 September 2021 - #4428280

>So the question is:

>Given a Render size of 640 x 480 and render it Twice each using a Different Resolution value (one 72px/in and one 300px/in)
>That should give out Two different final renders of Two different Resolutions, right?
>A) 640 x 480 at a low resolution of 72px/in
>B) 640 x 480 at high resolution of 300px/in
>
>According to my sample: Poser 11 does this but Poser 12 does not.
>According to my sample: Poser 12 is rendering both at 72px/in as confirmed by Photoshop
>According to my sample: Only Poser 11 is rendering two different resolutions of the same pixel dimension (640 x 480)

If you do these two renders in Poser 11 (640x480 at 72dpi and 640x480 at 300dpi), and then view them side by side scaled to display the same size on your screen, are they distinguishable in any way?

Yes they are , you will note the differences when zooming in the Image. 72 dpi will get useless when scaling 200 % 300 dpi up can be scaled up with ease 200% 300% without any quality loss.

same reason why 72 dpi is of no use for printing on paper as it is already a sort of zoom in, in most cases you will zoom your Image to fit the Paper. but you will note the same result on your screen when zooming. 72 dpi is for sure not ideal to enlarge a section of the Image, fact is also that when making a professional work you usually render a larger angle so that you later can cut out a section for a better presentation but still want to have a good quality if you need to scale up the Image to fit your preference after the cut. 

so again yes the dpi is important as soon as you wish having some professional results and not just 72dpi renders for a quick web show on Instagram or Facebook. It is also to consider that some  need a good dpi  if they sell there works for prints . Artwork is not just a quick sample render that you place on the web to get a little attention in allot of cases it also needs a certain Image quality.

I always render at a minimum of 300 dpi up then I load the render in a Photo Program to adapt it, if I need it for web presentation I then reduce it to 92 or even 72 dpi but the original will always have a major quality that sure can be seen.

It comes to it that you will not be able to just change the dpi in Photoshop expecting to keep the same size increasing the dpi as the dpi is produced while rendering and can't be faked expecting to achieve a better quality in a Image application, so this would not make a better quality of your Image. true dpi are generated when rendering, the higher the dpi the smaller your render square will be.

Sampler

You might want to check your render setting in poser 12. I just rendered these. One was Poser 12 set at 600dpi. It saved as 72. One is switching that image to 600 dpi and setting for the print size that it should have come out as. And one is rendered in Poser 11 and saved as 600dpi. I realize the texture isn't the highest quality to start with, but I can't see any change. Can you?

Cyogreem posted at 6:56 AM Fri, 1 October 2021 - #4428347

It comes to it that you will not be able to just change the dpi in Photoshop expecting to keep the same size increasing the dpi as the dpi is produced while rendering and can't be faked expecting to achieve a better quality in a Image application, so this would not make a better quality of your Image. true dpi are generated when rendering, the higher the dpi the smaller your render square will be.

THANK YOU Cyogreem!!! THANK YOU!
I had a feeling I was conversing with just web image posters but thought for sure some of the old professionals we used to converse with some years back were still around, some of those who render for comic books, some of those who render for editing into video (not just Instagram or YouTube posting). But it looks like most of them are either gone or stay lurking as I have these past many years.

@RedPhantom ; No, can not see much via your samples, however Cyogreem's example Do show the difference between a 72px/in and 600px/in very well and noticeably.
The primary issue that I have with Printing and not knowing ahead of time what Poser is doing is that when I print I am not printing to ordinary typing paper or even photo paper; my purpose is to print to a special paper (Pearl Matalic) that is expensive and gives the best print when the image is of high quality. Poor resolution will show more then would on everyday paper.

However, the angry one had shown a way to 'change the dpi without changing the paper size' in Photoshop (I have acknowledged this multiple times now). But as Cyogreem points out - 'Changing' values in an Image Editor does usually open up the can of worms of trying to "fake resolution". There are high end image apps for this but even then it is always a 'Best Effort' (however some of the new, expensive apps do pretty darn well).
So the question still remains: is Poser 12 actually Rendering anything other then 72px/in
When I find time to set up a good test to do an Extreme Zoom in on I will see.

@JoEtzold again, I will offer you again a thanks for pointing out "Resample" in the Image Editors....sorry if the rest was over your head and you are unable to 'see' yourself what we are discussing since you are not even using P12, But I will keep my further discussion of Poser 12 with those who are Actually using the program, thank you.

RedPhantom posted at 11:36 AM Fri, 1 October 2021 - #4428356

You might want to check your render setting in poser 12. I just rendered these. One was Poser 12 set at 600dpi. It saved as 72. One is switching that image to 600 dpi and setting for the print size that it should have come out as. And one is rendered in Poser 11 and saved as 600dpi. I realize the texture isn't the highest quality to start with, but I can't see any change. Can you?

These are the original renders, first is at 72 dpi second is 600 dpi original size render settings remain the same on both except the dpi settings I guess if your textures have 72 dpi it might not work but if you are using high quality textures it might affect if they get reduced , other method would be to print and then scan at this point you sure will see the difference, so even if one gets no difference like in your case  it should not be an excuse not to fix the issues in Poser 12 , else they shall just remove the option this way there will not be any questions about it if they can't fix the problem.

I am not sure if it still works after uploading the images but if it does you can save them and see by your self what happens when you scale them next to each other.

Edit: Nop uploading the Images changed the DPI to 96 so again a quality loss 

Actually it is simple Dpi is probably the digital simulation of a film. Like the quality of negative on how many light dots it will have, in combination with the shutter opening that throws light dots it could be compared with your Pixel size. the smaller the shutter the sharper your Image ( Negative ) the more small dots good for depth focus if you have something right in front of your camera. Shutter open will only keep your focus sharp and background blurry equals large light dots. So in a way all this is to be able to digitalize mechanic shots! The Function of Printing is similar , Obviously !  Just that you need these Digital settings to get the right amounts of sharp dots for your Printing if you want a good quality Picture. If you google you will see what amount of  DPI it will need to have a negative that can be enlarged to a poster without any loss. 

Ever been in a Movie theater ? you need to imagine a little square image that has such a high compression that the image projected on the huge screen remains totally sharp.

I do not believe that Dpi has been developed just as a fun setting that keeps your Images always the same no matter how high you set it up :)  and that just because Poser 12 can't handle it anymore that all the descriptions in the net about dpi are false statements . 

I don't know what you are doing so I tested it myself. Here's a 640x480 72dpi image rendered in Poser 11 using Firefly.

Here's the same image rendered at 300dpi in Poser 11. All render settings the same, except the DPI setting.

The two images are nearly pixel-for-pixel identical.

And to be clear, here is the setting I changed:

When you rendered your two images, did you keep the width and height the same, in pixels? If you are rendering them at different pixel dimensions, there will obviously be a quality difference. But at the same pixel dimensions, there is not.

If you have changed the width and height units to something other than pixels, then when you change the "Resolution" settings to a different number of pixels per inch, you will get output with different pixel dimensions.

It is a real time scan simulation to show what will happen if your Images are used for Professional works the render above have been made just by changing the Pix/In amount in Poser nothing else . Then a Print scan simulation as it is clear your screen of your standard Monitor will only display 72 or 96 Dpi but a Image for Print for example needs at least 300 dpi. every saved Image in Poser 12 if used for Printing needs to be adapted manually this is fact. 

But sure you can take a Mathematical Template  to recalculate the effective dimensions for your Print that will have again an outcome of 72 dpi  then using Gimp or Photoshop to change your DPI in your work. If you get a assignment for a work that gets Payed for Printing purposes you sure need to deliver what has been requested so either you recalculate or just have a working dpi setting in the app you are working with not just one that lets you think that you have it .

I Agree that it is complicated if you are not using your renders for Printing assignments or for a Gallery expo and because of this it might be easier if the Poser staff just removes this setting in Poser 12 just like in Blender that is limited to  72 - 96 dpi , ok Poser will be limited to 72 dpi . and then just recalculate what you need for Printing!

so what happens in your tests is just that you have a Monitor that will limit your works to 72 - 96 dpi and clearly not capable to show what would be if it were 300 dpi or higher on a Print by reducing again your 300 dpi image to 72-96 dpi as your Monitor is limited to these resolution but not the Paper or the film.

I'm so sorry but the settings in poser and shown by phtoshop from Igohigh some posts back and the arguments from Cyogeem just above are completely rubbish. As long as you set a 640 x 480 pixels render area its completely equal what DPI you set. You get everytime a 640 x 480 pixels output. DPI first comes into play if you want to output these pixels to paper or what else which is measured in inches or cm or else.

You seems to simple to understand that DPI or PPI is nothing absolute or ownstanding. It is only the bridge or relation between square pixels on one hand and a in real values measured paper or something else. Nothing more and nothing less.

If you want to understand that truely I suggest that you search in photographing forums for DPI and you find lots like you but also real professionell photographers which are declaring what is declared here around in several aspects.

#igohigh: I'm truely astonished about what you have written abaout printer people opposite computer people. You should remember that your beloved printers are able to do high quality output first since those computer people gave them a lot of electronic life. And I'm truely mostly astonished about your discussion cause I was absolutely in the opinion that a printing instructor should knows all about these above stuff to be good in his profession. Ok, sometime I can lay wrong ... I see. So be happy with your opinions further on ... if correct or not ...

But just for some others may be interested and not such simple as you: I'm since 40 years in that hobby business first with photografics and then also with rendering since their first moments. And that all with poster sizes as also with small handhelds on monitors, simple papers, photographic papers and seeing throug materials. So never again come around with your personel completely unproofen assumptions ...

JoEtzold posted at 12:57 PM Sat, 2 October 2021 - #4428428

I'm so sorry but the settings in poser and shown by phtoshop from Igohigh some posts back and the arguments from Cyogeem just above are completely rubbish. As long as you set a 640 x 480 pixels render area its completely equal what DPI you set. You get everytime a 640 x 480 pixels output. DPI first comes into play if you want to output these pixels to paper or what else which is measured in inches or cm or else.

You seems to simple to understand that DPI or PPI is nothing absolute or ownstanding. It is only the bridge or relation between square pixels on one hand and a in real values measured paper or something else. Nothing more and nothing less.

If you want to understand that truely I suggest that you search in photographing forums for DPI and you find lots like you but also real professionell photographers which are declaring what is declared here around in several aspects.

#igohigh: I'm truely astonished about what you have written abaout printer people opposite computer people. You should remember that your beloved printers are able to do high quality output first since those computer people gave them a lot of electronic life. And I'm truely mostly astonished about your discussion cause I was absolutely in the opinion that a printing instructor should knows all about these above stuff to be good in his profession. Ok, sometime I can lay wrong ... I see. So be happy with your opinions further on ... if correct or not ...

But just for some others may be interested and not such simple as you: I'm since 40 years in that hobby business first with photografics and then also with rendering since their first moments. And that all with poster sizes as also with small handhelds on monitors, simple papers, photographic papers and seeing throug materials. So never again come around with your personel completely unproofen assumptions ...

No Rubbish ! If you read correctly we are talking about Printing and not about DPI that could be seen on a monitor as the monitor is in first hand is set to 72-96 Dpi but this has ben mentioned several times ( It has nothing to do with web design ) The Dpi output is what you need to get a sharp Print output . but sure you can go ahead and render your Images and start printing them in high quality using 72 dpi as long as you just do the Newspaper flyers for the Naber Hood.

Why does in here always things end up with excuses that there not necessary if they fail in Poser ?  Guess it makes one feel better with some errors being able to live with them. But this way Poser will never be Final !

Poser renders pixels. Graphics files like jpg and png store pixels. The amount of detail in an image is determined solely by those pixels.

DPI and print size determine scaling for printing. Nothing more, nothing less. For a given print size e.g. in inches, a higher DPI will give you more detail, but it does it by creating an image with a larger number of pixels. If you want an image that will print 8x10", a 72dpi image will have a pixel dimension of 576x720, and a 300dpi image will have a pixel dimension of 2400x3000. That 300dpi image will absolutely have more detail but it has that detail because there are more pixels.

If the number of pixels is correct, you can trivially change the DPI setting with no loss of detail -- by changing the print size while keeping the pixel dimensions the same. What you can't do is increase the DPI setting while keeping the print size the same, because that would require getting more pixels which means creating information that isn't there.

All that said, there is clearly a bug in Poser 12, that causes it to incorrectly denote the DPI setting in the exported file. And that should be fixed. If you've changed the units in the render dimensions window, it may be especially bad because you won't see that the pixel dimensions are wrong. The workaround until it is fixed is to set the pixel dimensions correctly for your requirements.

Bug report submitted - pix/in setting not being saved with image file. 'Tis a very minor bug - if you set the physical size and resolution it will render the exact pixels required; it's just that pix/in is always set to 72dpi in the exported file. (I set a render size of 6x4" at 300pix/in which is 1800x1200 pixels, but in Photoshop the file is 72pix/in so the dimensions are 25x16.667" - still 1800x1200 pixels and easy enough to change, but that setting should carry over as it used to).

So to agree with and back up JoEtzoid and ChromeStar, that resolution setting has nothing to do with rendering. A pixel is just an RGB number, so pix/in is meaningless UNLESS you specify a physical size.

In Poser you EITHER set a physical size and resolution in the render dimensions dialog OR you set the number of pixels.

If you set the number of pixels e.g. 640x480 and then change the pix/in value it will be ignored UNLESS you change dimensions from pixels to inches or cm.

@ChromeStar
You wrote: "When you rendered your two images, did you keep the width and height the same, in pixels?"

Answer: Yes. In ALL examples I have done here the Pixel width and height were NEVER changed.


@Cyogreem
Spot on, everything you have said.

@JoEtzold
I have already, multiple times, acknowledged your pointing out "Resampling" function in the Image Editors.
The rest of your rant - perhaps if you actually USED Poser 12 you may be able to see what Cyogrem and I are seeing.


@ChromeStar
You wrote: "Poser renders pixels."
CORRECT
You wrote: "Graphics files like jpg and png store pixels. The amount of detail in an image is determined solely by those pixels."

True, but a little more complicated then that. JPG is a highly compressed image file where files such as PNG, PSD, TIF, RAW (well, we will leave that one out...) all have ability to hold much more data and are therefor higher resolution (and larger files).

....I think back years ago when some creators where posting their textures in BMP format; HUGE files. Back then I had a tiny Windows 98 computer, I once mentioned that I was converting them to JPG due to storage size and some where AGHAST that I would do such a thing for they said the JPGs would give me much lower resolution and therefor poorer renders....this is TRUE, but back then I was only rendering for 'pretty pictures on the Internet' not for printing.

You wrote: "If the number of pixels is correct, you can trivially change the DPI setting with no loss of detail -- by changing the print size while keeping the pixel dimensions the same"

True! However as JoEtzold pointed out - be sure to Uncheck the "Resampling" box in the Image Editor (checked by default in all of mine) or it will change the Pixel width and height. By unchecking the "Resampling" (as JoEtzold pointed out) you can tell the printer which Dpi to print out said Pixel Dimension.


@caisson
Yes, that pretty much clears it all up.
True, it is a minor bug - once you know about it AND if 'print' quality is not the final output target, otherwise most Poser users will never know the difference or that it even exists.

@ Everyone:
I think this issue is warped up for now. A 'minor bug' has been found, it only effects a small number of Poser users but it is not a function or use killer by any means.

End Result (ONLY for those who print for quality) - Determine your Print Size in "Pixel Dimensions" then in the Image Editor be sure to UnCheck "Resample" (like JoEtzold pointed out) so it will Not change your "Pixel Dimensions" and then enter your Dpi into the Document settings - hit Print
(well, only hit "print" once you have set all your other particular 'Printing Preferences' and 'color management' settings and your desired 'printer profile' from your libraries...THEN hit print - but NONE of these are Poser setting issues)