Overrriding shading model?

Date : Wed, 15 Feb 2006 15:51:42 +0100
To : <XSI(at)Softimage.COM>
From : "Morten Bartholdy" <xsi(at)colorshopvfx.dk>
Subject : Overrriding shading model?
I feel like I am flogging an almost dead horse here - though I use passes more or less always I have run in to something my lil' brain can't find a way to override.
 
I have a sh*tload of old shots I need to render and this means fiddling with the shaders is a no go. I need to render a beauty pass, shaded with shadows and all, an AO pass and a "flat" shaded pass, like constant with textures. Usually I'd do the last one by turning all lights off in an override and crank the global ambient up to 1.0, but this assumes all materials have similar diffuse and ambient values. Unfortunately this is not the case so I get some objects bright the way I want them and others very dark, making such a pass useless.
 
I have tried to find a way to override the shading model - ie. override a phong, lambert or whatever with a constant and keeping all textures including displacements, but so far no go. I feel like this should be doable but I can't get my head around it. Does any of you kind souls have some clever suggestions for this one?
 
Morten Bartholdy
3D & VFX Artist

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