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Material pixel depth offset and shadows.

In the material editor there is a handy "Pixel Depth Offset" parameter. I want to use it to re-create what is shown in the following picture.

alt text

Currently I can push stuff back using positive values and it pretty much does what is shown above. There is a problem though. It messes up all shadows. My intuition tells me that shadows are calculated using the depth buffer after alteration, and because of that you end-up with shadows that are offset and therefore do not match the geometry of the scene.

It seems to me that a solution would be to implement a flag for ignoring the Pixel Depth Offset in the shadow calculation. But maybe these is already some existing solution that I don't know about. Thanks for your help.

Product Version: UE 4.8
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asked Jun 12 '15 at 02:14 PM in Using UE4

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Douglas Lassance
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avatar image qimmer Jul 13 '15 at 11:07 AM

I am experiencing the same problem here. Tried to add a SHADOW_DEPTH_SHADER preprocessor check in the MaterialTemplate.usf, but doesn't seem to solve the problem. Some help here would be great!

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