question

Anthony PHILIPPE avatar image
Anthony PHILIPPE asked ·

Arnold GPU render transparency alpha

Hey!!

First, sorry for my english and if you don't understand everything.. ^^

I'm having an issue with GPU render on Arnold. Im trying to have a transparancy glass in a PNG file that I will use later in photoshop where i'll be able to change the background etc.. It works fine on CPU but not on GPU with the same settings. On GPU it takes the background and my object has a black background and no alpha. I join 2 screenshots to explain a bit more the problem.

Can someone help me? alpha-cpu.jpgalpha-gpu.jpg

arnoldgpu
alpha-gpu.jpg (18.1 KiB)
alpha-cpu.jpg (22.0 KiB)
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Ciro Cardoso avatar image
Ciro Cardoso answered ·

Tested your file and it is true, there is no alpha when using the GPU.

3 comments
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No alpha where? In the rendered PNG file?

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Anthony PHILIPPE avatar image Anthony PHILIPPE Stephen Blair ♦♦ ·

Even in 3DSMAX : 1620131814845.png

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1620131814845.png (62.2 KiB)
Ciro Cardoso avatar image Ciro Cardoso Stephen Blair ♦♦ ·

On the Arnold Render View.

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Stephen Blair avatar image
Stephen Blair answered ·

This is because Transmit AOVs is not supported on the GPU yet.

https://docs.arnoldrenderer.com/display/A5ARP/Supported+Features+and+Known+Limitations

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Will it be working soon? It's a really big deal for my company .. :(

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Sorry, there's no ETA on that...

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Anthony PHILIPPE avatar image
Anthony PHILIPPE answered ·

Is there a way to do it ? Without CPU ?

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