question

Alejandro Grau avatar image
Alejandro Grau asked

Arnold Maya : How to make opacity with proper transparency

How can I make in Arnold 5 the alpha with proper transparency ? Lets say I have an Ice cube and I want the alpha to keep the transparency correct instead of full white , so I can comp it later with a background image.

Thanks !

Alex

opacity
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Arvid Schneider avatar image
Arvid Schneider answered

Doing this approach is not physically correct, because the comped background won’t have any refraction. You might want to consider rendering a refracted UV map and distort the back ground in comp.

I the shader under transmission is an option to get a transparent alpha.

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Alejandro Grau avatar image
Alejandro Grau answered

Hi Arvid,

Yes I know is not physically correct , but for sure in many situations is so useful. Anyway thanks , I didn't noticed about the Trasnmit AOV option it works perfectly.

Big thanks and BTW big follower of your youtube Channel.

Alex

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直貴 越後 avatar image
直貴 越後 answered

@Arvid Schneider

Hi, was wondering if you can go into a little more detail of how to produce the refracted UV map to distort the background in comp. Would this workflow be applicable if I will be comping in After Effects?

Thx in advance.

Naoki

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Om Gothi avatar image
Om Gothi answered

look into transmit aov's. gives out transmission as transparency in your alpha channel

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直貴 越後 avatar image
直貴 越後 answered

@Om Gothi

Yeah, I tried the transmit AOVs, but like @Arvid Schneider stated, it isnt physically correct.

Trying to find an easy solution to refract the background in comp.

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