PDA

View Full Version : SSS reflection issue

ErixGraphix
03-05-2009, 11:18 PM
hi,
i'm working on a photorealistic head , using misss_fast_skin, it works nice but when i add reflection they look grainy.
I get information from this pdf :http://www.lamrug.org/resources/doc/sss-skin-tutorial.pdf
but i can't achieve similar results.
Here is two images, without and with reflections (same values as in pdf). For info, there is no FG or GI, just a 3 spot lights setup, and i work with 2009.

[/url][url="http://img21.imageshack.us/my.php?image=reflectionproblem.jpg"]http://img21.imageshack.us/img21/1571/reflectionproblem.th.jpg (http://img21.imageshack.us/my.php?image=reflectionproblem.jpg)
thanks for help!
LOTK
12-14-2009, 03:30 PM
Just guessing from the look of the image, this could be caused by low glossy reflection samples. Are you using glossy reflections? If yes, and you want to reflect an environment map (i.e HDR), try plugging the mia_envblur in the environment slot of your shading group. Do a search in the forum for extensive instructions.

Otherwise it would be caused by a very small size bump map (e.g noise) in combination with the skin specularity.
CGTalk Moderation
12-14-2009, 03:30 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.