Community
Arnold for Maya Forum
Rendering with Arnold in Maya using the MtoA plug-in.
cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

How do you render a flat color AOV pass with the aiStandard hair shader

3 REPLIES 3
Reply
Message 1 of 4
Anonymous
2569 Views, 3 Replies

How do you render a flat color AOV pass with the aiStandard hair shader

Hello, I was following a tutorial by Adam Skutt that utilized the alHair shader with Arnold 4. I'm using Arnold 5 with Maya 2018 using the aiStandard hair shader instead and trying to figure out how to render out a base color pass of my hair.

I'm using melanin to color the xgen hair, and can't figure out how to render a flat color pass (without influence from shadows or spec). Every AOV option available that seems related to color renders as black. There was an AOV option called "diffuse_color" that worked with the alHair shader in Adam Skutt's 2017 tutorial, but it doesn't exist in Maya 2018. The Beauty render pass has the color so the renderer has to be getting it from somewhere.

Tags (3)
Labels (3)
3 REPLIES 3
Message 2 of 4
lee_griggs
in reply to: Anonymous

There is an AOVs example here. You are getting black using it this way?

Lee Griggs
Arnold rendering specialist
AUTODESK
Message 3 of 4
Anonymous
in reply to: Anonymous

@Lee Griggs

I'm not sure I understand what you're referring to. I don't see mentions of rendering flat color passes on that page. Could you be more specific?

Message 4 of 4
brurpo
in reply to: Anonymous

If I understand you correctly, you want the hair albedo as an AOV.
You need a custom AOV with a light path expression (LPE).
For that, create a custom AOV, name it RGBA_hair for example and add the following to the LPE: C<RS'hair'>.A
Like so:

4150-hair-albedo.jpg

Also, keep in mind that arnold's aiStandardHair is different, and its color comes from the specular layer, not the diffuse. Usually the diffuse component for StandardHair is black and all of its color comes from specular, unless you use some of its artistic attributes, increasing the diffuse weight that is zero by default.

Can't find what you're looking for? Ask the community or share your knowledge.

Post to forums  

Technology Administrators


Autodesk Design & Make Report