Normals pass not matching between single channel and multi-channel EXR.

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Hello,

My normals pass is looking different depending on if the file is saved out as a single file exr or a multi-channel exr. The issue is apparent when viewing the rendered image in both Photoshop and Nuke. At first I assumed it was an sRGB/gamma issue, but putting an inverse gamma curve adjustment layer in Photoshop doesn't give me the same result. This issue affects me if I save out from the VFB or if I batch render.

I apologise if the issue has been raised in these forums already, I had a search for it, but couldn't find any posts about it.


Many thanks,
Nick.

[hermit.crab]

Quoting the docs "When Normals Render Element is saved as a separate render channel, its output value is kept between [0;1] range; if saved as a multichannel .exr, its output value is in the range from -1 to 1."

You can remap the [-1:1] to [0:1] values in Nuke through a "Grade" node, in which you set the blackpoint value as -1.

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Brilliant, thank you!