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Subject: I have artifacts on my crater walls.


UVDan ( ) posted Sat, 06 February 2010 at 2:01 AM · edited Mon, 20 January 2025 at 9:51 AM
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I tried to do electroglyph's lunar surface tut and ran into some problems.  I exported the file in Tif format and could not use the erode button on it because it put "rivers" in the landscape and there are no rivers on the moon.  So I used the raise/lower button and smooth button instead.  I thought it worked OK until I put Philip Drawbridge's KX-119 Bug in the scene to explore the lunar surface when I noticed there are artifacts on my crater walls.  Can somebody help me get rid of them?

Also Photopaint and ACDC will not recognize jpg's and bitmaps saved from PSP.  Why is that?

Free men do not ask permission to bear arms!!


TheBryster ( ) posted Sat, 06 February 2010 at 5:38 AM

Have you tried removing the vehicle and checking to see if the artifacts still exist?
I also think you need to re-think the craters. They look more like circles placed on the terrain. Craters really don't work like that.

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All the Woes of a World by Jonathan Icknield aka The Bryster


And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...


UVDan ( ) posted Sat, 06 February 2010 at 7:52 AM
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Please tell me how to make them more so like craters.  Here is the map I used resampled to 900 pixels the original map is 2048 on a 2048 terrain.  I have used gaussian blur on this map..The original map did not have it and I have gotten rid of the arties, but the fakeiness of the craters still exists.  See image below. 

Free men do not ask permission to bear arms!!


UVDan ( ) posted Sat, 06 February 2010 at 7:53 AM · edited Sat, 06 February 2010 at 8:03 AM
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Yes, I am bombing the moon.  If NASA can do it, so can I.

Free men do not ask permission to bear arms!!


airflamesred ( ) posted Sat, 06 February 2010 at 8:51 AM

The artifacts I have no idea.

I think electroglphs idea was to have the camera at a lower angle so you can't see onto the crater

If you do want proper craters you'll have to change your tiff


grafikeer ( ) posted Sat, 06 February 2010 at 10:03 AM

Try using a lighter grey instead of white for the outlines,this way they won't be so high...and I think the rims could be broken up a bit instead of forming perfect circles around each crater.I also think if you added an overlapping of more than one crater in some areas you would get the effect of repeated impacts...it'slooking good so far!


UVDan ( ) posted Sat, 06 February 2010 at 10:17 AM
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Thanks I will try that.

Free men do not ask permission to bear arms!!


grafikeer ( ) posted Sat, 06 February 2010 at 11:14 AM · edited Sat, 06 February 2010 at 11:21 AM

file_447753.jpg

Here's a quick terrain...don't forget that when an impact occurs,debris is thrown out from the centre...try adding some areas that convey this.


grafikeer ( ) posted Sat, 06 February 2010 at 11:20 AM · edited Sat, 06 February 2010 at 11:21 AM

file_447756.jpg

Here's what it looks like in Bryce.Also,many people forget that you can still go into the terrain editor and add/subtract areas using a soft brush...this way you can see the effect in realtime in the small window at top right and make any necessary adjustments.A good texture also helps,something rocky with a moderate bump height.The resolution should also be bumped up to massive resolution for greater detail in the terrain....hope this helps!


UVDan ( ) posted Sat, 06 February 2010 at 11:38 AM
Forum Moderator

That helps a lot.  Thanks.

Free men do not ask permission to bear arms!!


grafikeer ( ) posted Sat, 06 February 2010 at 11:47 AM

Anytime...glad to help!


electroglyph ( ) posted Sat, 06 February 2010 at 12:46 PM

Yes like Grafikeer says, stay away from white. I do because every time I hit erode the terrain also gets a little higher/whiter. If you get all the way to 255 you have nowhere to go and start making plateaus.

I usually copy directly from Paintshop and paste into the open Bryce terrain editor. I don't load saved images. The picture is still 8-bit. That's where the artifacts come from. I made 8-9 erosion passes on my image. Looks like you did about 3-4. Keep going it will smooth out. The inside of the craters will start to bowl out instead of looking like pie plates.


UVDan ( ) posted Sat, 06 February 2010 at 1:32 PM
Forum Moderator

Thanks.  But what about the rivers that are eroded into my terrain?  Will they disappear?  I did not use the eroded button only the lower and smooth because of the rivers the eroded button put in my terrain.

Free men do not ask permission to bear arms!!


electroglyph ( ) posted Sat, 06 February 2010 at 3:11 PM

file_447766.jpg

I don't know. Here's my terrain with textures off. There are a few rivers around the edge.  The Bryce erode filter has to have a difference to work on. If you saved the image as a jpg with a high compression ratio it can make little grainy spots that the filter can work on. I also did not use blur on the original image.


UVDan ( ) posted Sat, 06 February 2010 at 3:27 PM
Forum Moderator

Thanks.  I am going to dive back into it this weekend.

Free men do not ask permission to bear arms!!


TheBryster ( ) posted Sat, 06 February 2010 at 3:36 PM

WTG Guys!

Available on Amazon for the Kindle E-Reader

All the Woes of a World by Jonathan Icknield aka The Bryster


And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...


goofygrape ( ) posted Sat, 06 February 2010 at 5:51 PM

WTG  this helps all and now I don't need to ask just lurk and read you always find new stuff thanks to all
THE GRAPE


Quest ( ) posted Sun, 07 February 2010 at 10:17 AM · edited Sun, 07 February 2010 at 10:17 AM

Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2615494

file_447802.jpg

For a better understanding of greyscale heightmaps I refer back to this thread from 2006:


UVDan ( ) posted Sun, 07 February 2010 at 4:48 PM
Forum Moderator

Thanks, I missed that.  I need to explore the terrain editor much more.  lt seems I have barely scratched the surface.

Free men do not ask permission to bear arms!!


3eighty ( ) posted Sat, 13 February 2010 at 1:41 PM

LlIVIG NEAR CRATERS HERE IN THE sw, i'D LIKE TO SUGGEST THEY MIGHT LOOK A LITTLE MORE REALISTIC IF YOU ACTUALLY BOOLENED OUT THE HOLES INSTEAD OF HAVING A FLAT LOOK INSIDE THE RINGS...2 CENTS WORTH..


UVDan ( ) posted Sat, 13 February 2010 at 2:58 PM
Forum Moderator

Booleans are evil.  I avoid them at all costs.

Free men do not ask permission to bear arms!!


airflamesred ( ) posted Sat, 13 February 2010 at 3:09 PM

Quote - Booleans are evil.  I avoid them at all costs.

For why Dan?


UVDan ( ) posted Sat, 13 February 2010 at 11:42 PM
Forum Moderator

Files get bigger.  Procedure gets more complicated.  Terrain gets dubious improvements.

Free men do not ask permission to bear arms!!


TheBryster ( ) posted Sun, 14 February 2010 at 6:12 AM

Booleans are evil.  I avoid them at all costs.

HERESY!!!!

Available on Amazon for the Kindle E-Reader

All the Woes of a World by Jonathan Icknield aka The Bryster


And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...


silverblade33 ( ) posted Sun, 14 February 2010 at 8:36 AM

IIRC Bryce can use 16 bit greyscale images? was some odd way to do that many years ago, but version 6 and on can use them natively?
16 bit greyscale allows for MUCH more variation in height maps as it isn't 8 bit, 8 bit limiting you to 256 shades of grey.

Photoshop lets you use 16 bit images, Paint Shop Pro new versions kind of let you (weird as many functions won't work, grr!)

this picture,
http://www.renderosity.com/mod/gallery/index.php?image_id=1408490&user_id=7541&np&np
the asteroid is built from a terrian using 16 bit image, as 8 bit images due to the size of the object, no matter what you'd do would create obvious "steps" as 256 shades of grey simply isn't enough variance to cover the slow genele slope over most of it, and the edges.
So I built it in Photoshop, using lot of careful gaussian blur and gradients to keep it nice and smooth, exported as 16 bit .tif
:)

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