Object edges when Compositing

[kopar]

Hello all,

I'm experimenting with compositing workflows and I've come across an issue that I can't quite figure out.

When I render out to Raw Lighting and Raw GI, create my lighting passes by multiplying the Diffuse Filter by the GI and Lighting and add the layers together, i get an edge around my objects that isnt' there when I do a straight 'beauty pass' render or use the pre-multiplied GI and Lighting elements, this doesn't happen:

[percydaman]

http://www.thegnomonworkshop.com/sto...ss-Compositing

Check that out. Its worth several times its weight in gold.

[pg1]

you have a double alpha issue
you are better off to divide the diffuse out of the regular gi and lighting passes than using the raws

this is a free tutorial
http://www.vfxvault.com/vfxvault.com/Tutorials.html that explains what I mean but percydaman is right the multipass link he gave is fantastic

[kopar]

Brilliant! Thanks for the help and the links. Both are awesome resources!

[stilgarna]

Hello guys...

I've got some dummies question :

I'm using Reinhard dark multi : 1 and bright multi : 0.4

1) If I use color mapping other than linear, can I get same render as beauty in nuke with elements ?

2) do I need to render in linear then apply a color correction to get Reinhard ?

3) How to apply a Reinhard gamma correction to final render in nuke ?

Best regards...


PS : same problem here : http://www.chaosgroup.com/forums/vbu...light=reinhard