john-labrie
Jan '15

I have a problem with a lighter, not completely transparent shadow being cast by the transparent part of the .PNG used to texture my character. It's a "paper cutout" character. If you look carefully, the render shows a ligher shadow being cast by the rectangle, in the areas which are supposed to be 100% transparent.

My material is a Lambert with the .PNG mapped to the color and transparency slots, ambient color at 50% grey, incandescence is black, diffuse is 1.0, translucence and depth and focus at 0.0. Changing various parameters and trying a different material type didn't help. I am using a Mental Ray render on Production quality, and using Ray Trace shadows.

I am thankful for any advice on how to fix this shadow problem.

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    Jan '15

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    Jan '15
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john-labrie
Jan '15

I found the solution. Under the material's Raytrace Options, set Shadow Attenuation to 0. By default it was 0.5, and by the way, I was using a Lambert shader.