How to render depth pass with alpha channel transparency in cycles?

Question

I have a 3D object in the empty scene. I can click on the "transparent" checkbox to make a render with a transparent background. How can I render depth (or any other) pass with transparent background the same way?

Maybe I can use the alpha channel as a mask in compositor? What is the best way to do it?

https://blender.stackexchange.com/questions/27044/compositing-fog-destroys-png-alpha-in-images-as-planes-when-using-cycles — Serge L, Apr 26 '19 at 15:24

DrachenSeele · Accepted Answer · 2019-04-29T21:02:32.357

4

Yes, you need to use the alpha channel as a mask since transparency is not taken into consideration in the depth pass.

This is how I have done it:

I used the node called "Set alpha". I Plugged the depth into te "image" and the alpha pass into the "Factor" the normalize is optional but helps to see the depth better.

edited Apr 29 '19 at 21:02

answered Apr 26 '19 at 14:40

DrachenSeele

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Could you please explain how can I do it, what should the node tree look like? – Rumata Apr 29 '19 at 20:42
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Just like it's there, that's all there is to it – DrachenSeele Jun 23 '19 at 15:35
Thank you very much, that's what I was looking for! – Rumata Jun 23 '19 at 17:33

How to render depth pass with alpha channel transparency in cycles?

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