PDA

View Full Version : transparency maps in mental ray?


Inker123
11-17-2006, 01:20 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?

Inker123
11-17-2006, 01:52 AM
Here's an example:


software:

http://img166.imageshack.us/img166/6564/leavessoftxd4.jpg


mental ray:

http://img166.imageshack.us/img166/9012/leavesmrgp3.jpg

MaNdRaK18
11-17-2006, 04:48 AM
What shader are You using?

Inker123
11-17-2006, 05:43 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.

inkblack
11-17-2006, 07:18 AM
What file format are you using? Some formats give troubles....


Mathijs

Inker123
11-17-2006, 07:19 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.

CGTalk Moderation
11-17-2006, 07:19 AM
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.