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Old 01-03-2011, 03:16 PM   #1
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Default Layered Textures and Mental Ray

1. I create a layered texure with 3 layers.
2. I use 3d paint tool to create 2 black-n-white textures.
3. I assign 1 of the b&w textures to the alpha of the top layer of the layered texture.
4. I assign the other b&w texture to the alpha of the middle layer of the layered texture.
5. I render out in Maya Software, I can see all 3 layers.
6. I render out in Mental Ray, I can only see the top 2 layers.

Other people I know have the same result. Works with Software but not with MR. I've played around with alot of settings and searched Maya Help but I haven't come up with a reason yet. Anybody know why it won't work in MR? I've attached luminence nodes to the b&w textures. I've even set them to "alpha is luminance", etc. The texture sample looks fine, just doesn't render out properly in MR.
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Old 01-03-2011, 03:51 PM   #2
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what blend mode are you using?
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Old 01-03-2011, 04:33 PM   #3
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Top Layer=Over
Middle=Over
Bottom=None
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Old 01-03-2011, 05:25 PM   #4
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it works for me. I must be doing something different.
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Old 01-03-2011, 06:23 PM   #5
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I'll play around with it again.
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Old 01-03-2011, 09:39 PM   #6
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why are you using rgb>luminance? have you tried without?
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Old 01-03-2011, 09:43 PM   #7
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No, but I'll try without. I figured since the b&w doesn't have transparency info that I needed it. I'll try it without, thx.
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Old 01-03-2011, 09:51 PM   #8
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That did the trick, much thanks. At first it didn't work without the luminance node so I went into the b&w attributes under color balance and turned on "alpha is luminance" and that did the trick. Shouldn't the luminance node do the same thing as turning on "alpha is luminance"? Or is it two different things?
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