PDA

View Full Version : SSS rendering problem

lhitch
10-08-2007, 09:18 PM
OK, this is bizarre. I've never seen anything like this before. I'm getting some sort of repeating pattern in the texture, and either additional banding or the banding is caused by the repeating pattern. I've tried disconnecting the bump and spec maps so that I've only got an epidermal, a subdermal and a subdermal weight map. I've turned off the filters on the texture maps. No difference.

I don't even know where to start trouble shooting this. Anyone ever seen something like this before? Any suggestions?
ovendelon
10-09-2007, 10:00 AM
increase your lightmap texture size and lightmap samples
Ash-Man
10-09-2007, 12:43 PM
my guess it's the size of the SSS back and front

you need to adjsut the Algorthim control
there are many tutorials that cover that
lhitch
10-09-2007, 04:22 PM
Bingo! That was it. Thanks, Ovendelon, that did the trick. I increased the texture map from 50 x 50 to 500 x 500, and the samples from 64 to 256. Any suggestions on what good typical values for these settings are?
ovendelon
10-09-2007, 04:31 PM
if i remember right the X size should be 2 times the render res, and the y as the render res, but i may be wrong :) someone should correct me
lhitch
10-09-2007, 05:03 PM
I was working from a tutorial that said to make both the X and the Y the same size as the scene in scene units. My character is about 20 units high, so I made the texture file 50 x 50. Not nearly enough

The render resolution was set at 1024, but 500 for the texture file seemed to work OK.

Here's the final result.
CGTalk Moderation
10-09-2007, 05:03 PM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.