question

Edwin Sumalave avatar image
Edwin Sumalave asked ·

Alpha Channels not shown/seen through transmissive/refractive objects?

Does Arnold to C4D currently doesn't support Alpha Channels seen through transmissive/refractive objects? I'm trying to render glass with transparency alphas. I'm trying to get the glass on this image with a transparent alpha so I can add things behind it/between it and background in compositing. ref.jpg

transmissiontransparent
ref.jpg (68.7 KiB)
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Lachlan Westfall avatar image
Lachlan Westfall answered ·

THANK YOU!!!! This has been driving me nuts for a few hours!

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Rick Morgan avatar image
Rick Morgan answered ·

2 things you need to do: 1) In your transparent material, in the "Transmission" channel check on the "Transmit AOV's" option. and 2) if you are using an Arnold sky object for lighting, set its"Transmission" samples to 0.

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Kapil Chakre avatar image
Kapil Chakre answered ·

@Rick Morgan

you need to turn the Transparency samples to 0 on your Sky object.

I m getting your answare..Plz explane me. thanks

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Kapil Chakre avatar image
Kapil Chakre answered ·

@Rick Morgan

you need to turn the Transparency samples to 0 on your Sky object.

I m getting your answare..Plz explane me. thanks

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Rick Morgan avatar image
Rick Morgan answered ·

FYI - I just learned from a colleague that if you are using a Sky object (for lighting and/or reflections) but you still want the transparency to show properly in the alpha you need to turn the Transparency samples to 0 on your Sky object.

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Lee Griggs avatar image
Lee Griggs answered ·

'Transmit AOVs' should do the trick.

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