I'm falling on a probleme ( is it correct ? :D )

The shader n°2 work great with black and white trransparency, but with level of tranparency ( grey level ) all is opaque, an idea ?

Here is the defaut shader ( not really pretty ! )

Quote - The shader n°2 work great with black and white trransparency, but with level of tranparency ( grey level ) all is opaque, an idea ?

If you're using one of the Pro versions of Poser, be sure to turn off gamma correction on the transparency map. If that's not the problem, the best way to provide information is to post a screenshot of the material setup.

Lol thx, but it's not a GC problem, it's the shader ;)

It transform all grey in b/w and i dont know where ins the shader.

Booooookmark.

Quote - Lol thx, but it's not a GC problem, it's the shader ;) It transform all grey in b/w and i dont know where ins the shader.

And we can't help you find it without a screenshot of the shader details.

I expect that Anthanasius is using the Lace Map built into the shader.

I did not code it as a transparency map. I coded it to be a lace map, indicating how thick the lace was, which is sewn into or on top of the nylon substrate.

This means that the gray-to-white levels do not control opacity of the lace. They control the height of the lace! If you were to use a lace map and think of it as a bump map, not a transparency map, then all will be revealed and understandable.

The transparency of lace is not a concept built into this shader - lace is opaque, always. It's not made of nylon - it's made of cotton or other opaque fibers.

If you wish to simulate a variation in the density of the nylon fiber weave, well then you should be modulating the PM:Density node. You want to plug your map that you are thinking of as transparency into the Density. Why not into Opacity? Well you could do that, but it would have no corresponding basis in reality. Nylon clothing is not made from nylon threads with various opacity. Instead, variable opacity is accomplished from a single type of nylon, but by weaving it tighter or looser in different places.

So - if you wish to create a situation where the map you use is a density map, then you must simply decide what the black level minimum density represents, and the white level maximum density.

Then you would hook it up to one of the PM:Density values, such as Value_2.

In Value_1, you place the minimum density - this is the low value - what to use when the map equals 0.

In Value_2, you place how much the map increases the density - the high value minus the low value.

For example, if you want to indicate that black map (0) is .25 (25%) density, and that white is .7 (70%) density, then

• place .25 in PM:Density Value_1.

• connect your map to PM:Density Value_2 and set that to .45 (.7 - .25)

Thus, when the map is 0 (black), density will be .25 + .45 * 0 = .25

When the map is 1 (white), density will be .25 + .45 * 1 = .7

When the map is gray, the density will be somewhere between .25 and .7

Hmm - after studying the math I used, I see another approach. The amplification factor used to trigger evaluation of the lace is in the PM:Enable Lace node - which label says you should set=1.

Well, if you set it to .1, then the entire lace map range [0 to 1] will be re-mapped to a tenth of that [0 to .1] - and this part of the map range is used only for opacity!!

So - to use the Lace Map as a bump map and a mask, set it to 1.

To use it only as an opacity map, set it to .1.

Note - you cannot get the lace color to work in this unintended mode. The idea that the material is a partial mix of nylon and lace was not something I anticipated. It doesn't quite work as a color mixer.

It work !!!

Thx ;)

Where can I find the Bagginbills Nylon Shader?I've googled and all I see are real nylon shader brushes.

Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?message_id=3662872&ebot_calc_page#message_3662872

The link should take you to the post that the shader is in.

Thanks Raven.

What an excellent thread, interesting and challenging.  I've been wondering about simulating organza for formal clothing and this discussion gave me a whole new way of looking at how the nodes work.  Even the math was fun to follow.  Thanks BB for taking the time to pursue this.

Was going through this ... the link from Raven takes me to the main forums page and not to a specific thread.  Can anyone help me with that?  I would like to get this shader.  Thank you.

New forum software has removed the file name of the uploaded Poser shader. It used to be bbnylon2.mt5.txt - now it's file_454868.txt which is why nobody can find it by its name.

Thanks Rendo - brilliant.

The post containing the shader attachment is here: http://www.renderosity.com/mod/forumpro/?thread_id=2803439&page_number=5#msg3662872

By the way - the new forum software does not permit uploading non-image Poser files anymore even if I try to fake it out with calling it something.jpg.

So - no more free shaders from me at Rendo.

Thanks for everything you've shared with us, bagginsbill... loved seeing the math behind your shaders. I hope Renderosity sorts out the forum problem.

@Boni: Here is a direct link to the text file: http://www.renderosity.com/mod/forumpro/media/folder_10/file_454868.txt

Just save it as a text file, and rename to bbnylon2.mt5

By the way - the new forum software does not permit uploading non-image Poser files anymore even if I try to fake it out with calling it something.jpg.

So - no more free shaders from me at Rendo.

Doesn't even seem to be a Code tag... :/

Have the shader loaded ... I'll ask about the file issue.  Now to play.

Have the shader loaded ... I'll ask about the file issue.  Now to play.

I have collected some lace patterns and now I can use them. 

Ooooh what fun!  I love this sort of thing and wanna thank BB for taking the time to show the math and figure this stuff out.  I've grabbed this entire thread and will go over it in detail at work tomorrow while my computer renders more boring technical video.  My personal project at home involves creating sheer organza-like materials for designing bridal apparel.  Some of the new real world materials being used by a couple of designers in eastern Europe have some interesting sheens.

...and thanks for dragging me over here Boni.  I'd've never found it on my own.  BG is correct in saying that the forum's search engine is horrific.

You are welcome ... but remember that's "BB" not BG. :)

Kaleb242 posted at 5:22AM Fri, 20 November 2015 - #4195496

@Boni: Here is a direct link to the text file: http://www.renderosity.com/mod/forumpro/media/folder_10/file_454868.txt

If I try saving this file I just get a txt file full of HTML code; it looks like Rendo broke something in the meantime. Does anybody happen to have a copy of the shader they'd want to share, or know where to find it (I tried Google already and most links refer back to this page).

Thanks ;-)

Let's help boffel987 out and get a new link?

Ping. Boni - I still get people asking about this material and here we are a year later the original attachments are still gone. I just sent someone here again.

Speak to Rendo - seriously they just don't understand how terrible and pointless this is. The attachments should be restored - there NEVER was a reason to remove them.

I'm fed up with the smarmy attitude of the staff. They fucked up and this needs to be fixed, as well as 50 other things.

Hello bagginsbill, as I said in you other thread, I will remind the admins that this is a major issue ... and needs attention now. It is the best I can do and I will keep you informed. I understand and share your concern.