[Bf-cycles] problem compositing raytraced DOF

Bassam Kurdali bassam at urchn.org
Tue Mar 4 03:57:04 CET 2014

When compositing raytraced DOF I'm noticing that alpha is not where I
expect it to be, i.e. there is some transparency in opaque part,
resulting in light leaks, at least that's what I think is going on.

Hi all, I'm not sure if this is:
a- a bug
b- not enough samples issue
c- just not possible to comp alpha blurs this way :)

so I'm posting a .blend here:

If the answer is C am I correct in assuming I can still render in render
layers, and use the add node to add light in one layer on specific

so instead of : 

background has light A

foreground has light A + light B

alpha over foreground to background

I'd do:

background + foreground has light B

foreground has light A

add foreground to background + foreground...


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