View Full Version : final gathering and white lamberts
08-24-2008, 03:03 PM
Am i going mental again?
I'm inside a white lambert cube, there are no holes in it to let the lightsource in, yet when i render with FG on, you can still see it.
Am i missing the point here?
08-24-2008, 05:06 PM
yes you kinda are . . .
fg is lighting your scene based on the objects in the scene and their color (a simplified explanation)
try progressively turning the color of your cube down to black while test rendering and you can see what i mean
08-24-2008, 05:52 PM
Yeah but if there's no light or incandencance then surely the image should be black?
Anyway I think mentalray has misdirected my question.
I have a scene that I think is being overly lit by one directional light with FG turned on. At first I thought it was to do with the secondary bounces as the whole scene was being lit quite brightly. But I think now its to do with the stupid groupID nodes that Maya refuses to optimise and delete....if you get rid of them then the scene lights completely differently.
If this is the case then I'm really not a happy chappy as my textured scene is quite large and the textures will need re-assigning and its taken my a while to find out that it could be a crappy bug.
08-24-2008, 07:10 PM
Is the "enable defolt light " turn on ?
08-24-2008, 07:15 PM
no, i think something has just got corrupted along the way. I tell maya makes me want to scream sometimes. :)
08-24-2008, 09:33 PM
Hmmm.... GroupID nodes are somewhat important when it comes to shader assignment for example... They can't be "optimized", and are probably not directly part of your ploblem.
08-24-2008, 09:36 PM
I did a quick test with a cube, reversed the normals, went inside, and the FG render is black.
With the default light on it's lit (obviously).
Are you using the MR lambert or the Maya?
08-26-2008, 12:53 PM
hi, thanks for reply, ive figured out the problem although I'm not sure I can fix it...its my decrepid brain...its worn down to bare essential thinking these days. :)
sorry for wasting your time.
08-26-2008, 12:53 PM
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