LC #42 Pipers Alley

View Full Version : transparency maps in mental ray?

11-17-2006, 02:20 AM
For some reason, as soon as I switch my render to Mental Ray, my transparency maps cease to work. What is supposed to be transparent becomes white. It works just fine in a software render. I could just do a luma-key in comp, but it wouldn't be as good than if I could fix this issue. Is there an option that I'm missing to enable transparency maps to work in mental ray?

11-17-2006, 02:52 AM
Here's an example:


mental ray:

11-17-2006, 05:48 AM
What shader are You using?

11-17-2006, 06:43 AM
It's just a plain old lambert with a color map, transparency map, and bump map. I havent had a chance to tweak anything because I want to get rid of this problem first.

11-17-2006, 08:18 AM
What file format are you using? Some formats give troubles....


11-17-2006, 08:19 AM
I seem to have fixed it. I was using just a basic sphere with a bright gray to illuminate my scene, and I had to turn off "visible in transparency" under the sphere's mental ray attributes.

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11-17-2006, 08:19 AM
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