Stripey mental ray shading

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Old 05 May 2011   #1
Stripey mental ray shading

Hi everyone,
I have a problem with rendering my scene in Maya.
Here's the set up of lights:


And here's the result:

As you can see, there's some weird stripeyness going on.

The shader on the character is "misss_fast_skin_maya" and the renderer is the default values for Mental Ray on "Production" quality.

Does anyone have a solution to this?
 
Old 05 May 2011   #2
It looks like something to do with the smoothing group. You can do a test by apply a Smooth to it and render. If that solve the problem, make sure the polygons are using the same smoothing group when you render with lowres mesh.
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Old 05 May 2011   #3
check the lightmap on the shader

Hi Inazuma,
My guess is there could be an issue with your lightmap setting.Check for the following
Texture type----------Color
Writable--------------ticked
File size Width--------ideally it is through an expression but manually you can set it to be double of your render image width.
File size Height--------ideally it is through an expression but manually you can set it to be your render image height.
File Size Depth--------32 bits

Let me know if it helps.
Regards.
Rahul.

Update
add the following expression as referred above in case it is missing/broken in the lightmap
mentalrayTexture1.miWidth=defaultResolution.width* 2
mentalrayTexture1.miHeight=defaultResolution.heigh t


Last edited by snikt : 05 May 2011 at 07:46 AM. Reason: update
 
Old 05 May 2011   #4
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