CGTalk - MR not spiting out alpha cha W tiffs

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Aachen

01-27-2005, 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.

Thanks,

JM

BillSpradlin

01-27-2005, 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

01-28-2005, 02:28 AM

ha! I just had this problem yesterday - thought it was somthing AE was doing . . .

Ash-Man

01-29-2005, 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

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