View Full Version : MR not spiting out alpha cha W tiffs

01 January 2005, 10:06 PM
I am rendering with MR and rendering out tiffs, in the image File output, Alpha channel is grey out. When I open the tiffs in PS I don't get an alpha channel, it seems to be inbedded in. Am I doing something wrong or is it a glitch. If I open F-check, I can save them back out as tiffs, but the problem is it screws up the frame # ext.



01 January 2005, 10:19 PM
Stay away from using tiffs with mental ray, there are some buggy issues with them, especially if you use any type of compression on them.

Steve McRae
01 January 2005, 02:28 AM
ha! I just had this problem yesterday - thought it was somthing AE was doing . . .

01 January 2005, 04:49 PM
have you tried checking the Pass Surface Alpha

in your render globals -Mental Ray tab
scroll down under the Custom Entities
check the box Pass Surface Color Alpha Channel
This will make it show up as solid alpha

CGTalk Moderation
01 January 2006, 05:00 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.