View Full Version : No alpha mask on Misss Fast Skin? help

Rick Davidson
12 December 2006, 09:26 PM
Er... anyone know why a Mental Ray Fast Skin shader isn't appearing in the alpha chanel? How can I fix it? Arggh...

12 December 2006, 09:49 PM
go to render settings, under custom entities and enable pass custom alpha channel, I guess this is the thing you need to do

Rick Davidson
12 December 2006, 07:45 PM
Wow thanks Elmo, that did the trick :) Too easy. Now I've just go to figure out how to make the mask on the floor reflection transparent ;) Going to have to learn render layers I think..

12 December 2006, 12:27 AM
much to learn we have ;)

04 April 2007, 02:05 PM
hey awsome trick, ive been rendering out separate pass' for all my mental ray shaders the past while, im new with them and its kinda stupid that its in a totaly different spot then maya shaders.

anyone know why its like this by chance ?

at anyrate it works and is going to save me some time ! thanks alot !

04 April 2007, 07:54 PM
This sounds like a good technique as my renders have only partial alpha channels - some of my materials are Maya, some MR.

Which "render settings" should I be looking for? Is it under the Render Globals? Is it under the material attributes tab? Thanks for any further clarification...

04 April 2007, 01:16 AM
sometimes pass custom alpha channel option does't work for me for some reason, so another option is to create a surface shader and plug your skin shader into the out color of the surface shader and just be sure to plug your light map into the lightmap slot of the surface shaders shading group.

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04 April 2007, 01:16 AM
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