Hi! I trying to render my characters & Bg as a separate layer and composite together in nuke. The problem is I want to keep my character’s shadow colour the same as when I render in one pass (Char & Bg ). When I apply mr Matte/Shadow/Reflection to all the Bg object and render I get a gray BG when I change the cam mapped bg to white. Is there any way to get a pure white bg colour or what is the workflow for separating the Char & Bg and yet still keeping the shadow colour? I only get this gray bg when I use Exposure Control [ mr photographic exposure control ].
Matte/Shadow/Reflection with Exposure Control
ndeboar
#2
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You shoudn’t render with the mr photographic exposure control if you plan to do post work (you should apply a sRGB LUT in comp, and import all your footage as Linear).
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Most compositing software assuming CGI rendered images are pre-multiplied, thus you need to be rendering onto a black background, not white.
MisterS
#3
on a similar note (i.e. I’ve integrated my 3D into a HDRI pano using matte/shadow/reflect) -should I be able to get a linear output of this HDRI background and 3D in one pass?
I’m using gamma 2.2 in, 1.0 out and have enabled 32bit float rendering in mental ray and have flicked off exposure control. Now my HDR background looks fine but the 3D is way overbright and clipped when I import into Photoshop to tonemap.
Note: before I used logarithmic exposure control to produce my final result in Max and it looked fine - I’ve never adopted the full linear workflow but I’d like to. I figured I could just flick exposure control off and that would be that.
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