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Clare H avatar image
Clare H asked ·

Arnold GPU beta Z depth only affects one object

I've tested this on multiple different scenes and the results are the same. It'll always just randomly select one object for the z depth

z-depth
gpu.png (681.3 KiB)
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Mads Drøschler avatar image
Mads Drøschler answered ·

We can for the mean time just generate a manual one with a volume shader, it renders virtually instantly with OptiX enabled.

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Mads Drøschler avatar image
Mads Drøschler answered ·

Confirmed, busted.
I actually made the CPU mistake and probed on that one.
I can totally reproduce the Z AOV here actually returns nothing at all.

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Nik Nikam avatar image
Nik Nikam answered ·

Yes, I wasted all day, I thought it was my rig (originally used with Mental ray) causing the problem. Only to accidentally hit render when I opened a new scene in Maya, and here the render was set to use default CPU, and the Z depth rendered just fine with the same objects. Also with Beta GPU it does render sometimes one object for Z depth at exposure 0, but when you move the exposure a bit you can see that it reads other objects too, but it just looks like an alpha map and no depth detail, just plane white.

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Mads Drøschler answered ·

What build are you rendering with?
I just tried with a newer test build and works fine here.
I save the Z AOV to EXR and load in post editor and crank down exposure and all my assets shows correctly in the Z layer.

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