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Casey Garr avatar image
Casey Garr asked ·

Rendering Arnold EXR Z depth pass in 3ds Max 2019

I would like to render an EXR Z depth pass using Arnold in 3ds Max 2019. These renders will be used to show depth of field information in an animation I am compositing in Adobe After Effects. I am having trouble getting the Z depth pass to work correctly - when I render the Z depth pass, the image appears black (instead of the usual grayscale gradient). I have brought the render into After Effects and changed the exposure, which does reveal the solid color of the objects in the scene, but still does not contain the gradient information necessary for the depth of field information.


When I have rendered Arnold Z depth passes in 3ds Max 2018, and Z was selected in the AOV tab, a drop down tab appeared that allowed you to adjust the minimum and maximum parameters, thus controlling the range of the gradient (example image below). I cannot seem to find a similar tab that allows you to change this range in Max 2019. How should I go about changing these parameters in Max 2019 in order to render a Z depth pass with the correct gradient information?


Thank you!

arnoldmaxtoa3ds maxz-depth
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Stephen Blair avatar image
Stephen Blair answered ·

That (what is in the screenshot) is not for Arnold

The Arnold Z AOV is not normalized to values between 0 and 1, you're getting the actual depth values

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Okay thank you. Since parameters should not need to be changed for the Arnold Z depth render, do you have any other suggestions as to why the render would appear black or with objects as solid colors as opposed to the typical gradient?

Right now I have the passes rendering at full float (32 bits/Channel) and the project in After Effects also at 32 bits/Channel.

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