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Render transparent background in arnold

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Hey there.

little emergency here going on: can some one tell me how to render in arnold without a background.

don´t have a HDRI/background object but it´s still black. tried everything i could think of and tried using a aov with a alpha map

but with no success. thank you!

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make sure that you save your image as .png or exr.

A .jpg for example is not able to store an alpha channel.


If you want to save out multiple render passes, you need to save out you image as exr. Exr is the most common Image type to save out multiple passes.

In your case the background should be transperant by default. just make sure you added the right filename extension when you save out your png or exr.

Edited by Varaya

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