Shadow Pass

[glorybound]

I thought I asked before, but I can't find it. How is the shadow pass used in post? I would expect to see an inverted lighting pass, but it's not. Actually, now that I think about it, you could invert the lighting pass to darken shadows.

[Neilg]

You can add it on top of the final image to remove shadows. I've used it other ways too but not for a while.

[glorybound]

What blend mode? Nothing really makes sense.

[Neilg]

e: i was wrong. i cant remember how i've used it, I just know i've used it for creating masks and to do stuff to some stills a long time ago.

[glorybound]

I always create it, but never us it.

e: i was wrong. i cant remember how i've used it, I just know i've used it for creating masks and to do stuff to some stills a long time ago.

[Teriander]

Glorybound,

Im assuming your shadow pass is saved on a file that supports Alpha channels. If so, try adding your shadow pass with the blend mode "Add".

[Svetlozar Draganov]

Shadow Render Element could be used to remove shadows in compositing - it basically calculates Lighting information but only in shadows area.
It is supposed to be used in Plus/Add blending mode.
Here is one example of its usage.

1. Simple composition with GI / Lighting / BG render elements:



2. Adding Shadow Pass in Plus blending mode: