Deep compositing and antialiasing issues

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  07 July 2013
Deep compositing and antialiasing issues

Ive been trying to test the workflow for deep compositing. I have exr 2.0 files with deep data. When I merge my passes, everything seems to work as it should. The auto holdouts are there, except that I am getting antialiasing problems with intersecting geometry. I have tried all different levels of sampling.

Thanks for any help
 
  08 August 2013
So this is normal. Even in a standard render the intersection is not very clean until you add a multi-pixel filter and other interpolation techniques into the renderer.

A nice work around though with Deep that you have a deep front and deep back which is typically in the same location. With a deep expression node you can essentially push the front and back apart and get a nice fuzzy edge on any intersection of surfaces.

Add this deep expression node to your deepRead before you deepMerge. Modify the expression distance to make it look more or less transparent along the intersection.

set cut_paste_input [stack 0]
version 7.0 v8
push $cut_paste_input
DeepExpression {
chans1 deep
deep.back deep.front+0.02
name DeepExpression1
}
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-deke
 
  08 August 2013
Nice ! thanks i will try it
 
  08 August 2013
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