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Z-Pass not showing up in linear EXR Rendering

Posted: Thu Aug 19, 2021 10:48 am
by henningricke
Hi fellow Octaners,

I’m currently struggling with an issue.
(Working on C4D R21 with Octane 2020.2.4-R2)

When rendering out linear EXR files, the z-pass comes out as plane white even though it shows up perfectly correctly in the viewport.
Z-Pass_Issue.jpg
This seems to be a know issue for quite some time.
In this video from 2 years ago https://vimeo.com/303997000 “Mesh Mash” mentions to set the “tonemapping” to “tonemapped” in the render passes to fix this.
Old-Rendersettings.jpg
Unfortunately the UI changed in the last Version and the tone mapped option vanished from the Renderpasses. I found the option “force tone mapping” in the “Main” Settings. But activating it doesn’t solve the issue.
New-Rendersettings.jpg
Does anybody have an idea what I’m missing here? Is there maby a workaround? I would appreciate any tips.

Re: Z-Pass not showing up in linear EXR Rendering

Posted: Thu Aug 19, 2021 10:51 am
by aoktar
Buffer types are simplified for latest builds.
With linear buffer z-values are not normalized to 0-1 range. So not visible to eyes. You have to apply some level control in post fx to see z-pixels for your eye pleasure. This is very FAQ topic since many years ago.

Re: Z-Pass not showing up in linear EXR Rendering

Posted: Thu Aug 19, 2021 11:19 am
by henningricke
Thank you for the quick reply.
Unfortunately I can't find a propper way (at least in After effects) to get anything except white out of the rendering.

Re: Z-Pass not showing up in linear EXR Rendering

Posted: Thu Aug 19, 2021 11:20 am
by aoktar
henningricke wrote:Thank you for the quick reply.
Unfortunately I can't find a propper way (at least in After effects) to get anything except white out of the rendering.
Check the Octane C4D manual for that. There's some data to explain this.