PDA

View Full Version : mental ray problems

vallaha
07-02-2008, 04:50 PM
ok this is weird. i assign a tree texture to a poly plane but as you can see fro the attached image, i need to get rid of the green back ground, so i pump in an alpha chanel through the transparency. all is fine when i render with maya renderer but when i render with mental ray the green doesnt go. its still visible. why and how can i solve this problem

cheers
achoury
07-02-2008, 06:23 PM
ok this is weird. i assign a tree texture to a poly plane but as you can see fro the attached image, i need to get rid of the green back ground, so i pump in an alpha chanel through the transparency. all is fine when i render with maya renderer but when i render with mental ray the green doesnt go. its still visible. why and how can i solve this problem
cheers

Hi
The green go away only when your color image contain an alpha channel on it, ie in one single RGBA file (.tga, .tif, .iff, .png etc.. )
in your case you are applying a mask to the transparency channel, not the alpha!
like the picture here:http://img45.imageshack.us/img45/1530/testuj9.jpg
so build your alpha channel in single file RGBA, and it should work without any pb!
/Rachid
CGTalk Moderation
07-02-2008, 06:23 PM
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.