Noisy render in specific zones

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

 
Thread Tools Search this Thread Display Modes
Old 03 March 2014   #1
Noisy render in specific zones

Hi everyone,

I have some difficulty to resolve my problem.
I use MentalRay for character project in Maya. Here is a part of my render :


As you can see, I have a noisy effect in specific zone :
-Eyes
-Neck
-Back Hair

My lighting setup is a studio-like one. Three areaLights : One Keylight, one fill, and one back.
I also use Raytrace Shadows on them. (1 Ray, and 8 for the depth limit)

I think my Sampling is good for Raytrace :
-Adaptive Sampling
-Max level : 2
-Contrast : 0.1


Have you any idea to resolve this ?

Thank you
 
Old 03 March 2014   #2
Have you tried increasing shadow samples?

Also, try using unified sampling if you have a new-enough version of Maya (it's in 2012 and 2013, just hidden in string options). The old adaptive sampler won't deliberately target-fire shadow and reflection noise the way unified-sampling will.
 
Old 03 March 2014   #3
I don't have much experience with the unified renderer but I will say that that contrast ratio is quite high, I'd usually have it on 0.01 or less.
__________________
3D Reel, Photography and Blog
 
Old 03 March 2014   #4
Thank you for your answers,

So I decided to check a little bit all the paramaters which can be affect it.

Here's the results in order :

1 - One Shadow Ray / Adaptive Sampling (2 max / 0.1 threshold)
2 - Four Shadow Rays / Adaptive Sampling (2 max / 0.1 threshold)
3 - Sixteen Shadow Rays / Adaptive Sampling (2 max / 0.1 threshold)
4 - One Shadow Ray / Fixed Sampling (2 / 0.1 threshold)
5 - Four Shadow Rays / Fixed Sampling (2 / 0.1 threshold)
6 - Four Shadow Rays / Adaptive Sampling (2 max / 0.01 threshold)



I think the threshold is a good way, but 0.01 is the mininum value...
 
reply share thread



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
CGSociety
Society of Digital Artists
www.cgsociety.org

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump
Miscellaneous

All times are GMT. The time now is 05:17 AM.


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.