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Juan Pablo avatar image
Juan Pablo asked ·

Transmission AOV Issue

Hi guys I have a question. I´m really lost with this. I have a plastic material. But this plastic material has a roughness transmission. Like a silicone.

The thing is I need the alpha of this to work in photoshop. I need the alpha of the refraction with the roughness effect. But the alpha show me the entire object with no roughness. I´m working with Arnold 5.

I do not know which is the AOV to do this and how to use it in Photoshop.

Thanks a lot guys

aovmaterialtransmissionrefraction
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What would you want that AOV to look like? Have the alpha only where there are "perfect refractive" pixels? Comping rough refractions isn't possible (as far as my knowledge goes)

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Stephen Blair avatar image
Stephen Blair answered ·

There's currently no AOV or LPE that will give you an alpha for refraction. That's something we're looking to add soon.

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Thank you Stephen, it would be great!

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Juan Pablo avatar image
Juan Pablo answered ·

Thanks Stephen!...

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Stephen Blair avatar image
Stephen Blair answered ·

Arnold 4 had a refraction opacity AOV, but there's no equivalent yet in Arnold 5.

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Juan Pablo avatar image
Juan Pablo answered ·

I will try to be more specific. I will work with 3Ds Max Vray and you will see what I need from Arnold.
I made this example in 3Ds Max and Vray:
ca1.jpg
As you can see in that image (Ca1.jpg) I made 2 boxes and one of them is a glass with roughness in this case the name in Vray is Glossiness. And when a select to see the alpha channel I see this:

ca2.jpg

Well I need the exact channel in Arnold. I can´t believe this option it doesn´t exist.

When I try to do this in Arnold I only see all white in the alpha channel with no roughness trough the box.

Thanks guys!


ca1.jpg (276.9 KiB)
ca2.jpg (40.6 KiB)
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