Normal pass / Position pass ?

[Anonymous]

Hi,

What is the difference between “Normal camera” (pass) and “Normal world” (pass) ?
What is the difference between “Point camera” (pass) and “Point world” (pass) ?

I’d like to relight within Nuke using the “Relight” node.
Which normal and position pass should I use ?
World ? or Camera ?
Why ?

Thanks,

Alfafa

[Anonymous]

Hey, so point pass maps all the points of your CG model to XYZ coordinates and the normals pass maps the direction those points are facing. But those properties need a starting point, some origin to be relative to. If you say “camera” you’re saying move and rotate these points based on the location and direction of this camera I am viewing from. If you say “world” then you’re saying base the points on moving them away from 0,0,0 aka the world origin.

So the Relight node in NUKE is built around using WORLD space. I’m thinking because it’s a constant, easier to deal with. However, if you come from a program like Max where Z is up, you’ll have to do some work on your passes shuffling channels prior to using the relight node, as NUKE is geared towards the Maya Y up environment… FYI

[Author]

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