Flat Color Shader, is it possible?

[esqwuared]

Hey-

I need to find shader that will essentially paint a flat color within the bounds of the object it is applied to in the image. In other words, I don't want the object to have any shading whatsoever. It does, however, have to accept shadows from other objects.

I tried setting a lambert to pure white with a matte setting, which gets close, but I still get some darkness around the edges of my object. I want an object painted with this shader (of color white) on a white background to yield a rendered mage that can be treated as an alpha channel in which the shadows cast upon my object (by other objects) are black and everything else is wholly white.

Is this the kind of thing I can do with a ramp in which both my shadows and highlights are white? I've never used a ramp before, so if someone could give me a hint I would much appreciate it.

[bjorke]

Use lambert, set the colors tro black, set you color via "Incandescence"

No special shader needed.

[joojaa]

Well that wont make shadows cast on the object. So do this.

Connect your texture toa a +-average node. Then connect a use bacckground matte opacity to the same node and set the operator to -. Then make sure the reflection limit of the use background is set to 0 unless you want the reflections to cast shadows (wne raytracing is on only!)then connect the plus-average outout to a surface shader!