Best Way to Create Matte in Octane for Maya?

[jayroth]

I have a character who needs to be clipped by a plane for compositing. Typically a simple white plane/black character with no shading would do the trick. However, I am getting some weird speckles on the character, and there is no real way to insure an old fashioned full white/full black result in Octane, as far as I can tell. I am outputting a Sample Enviornment, which gets me very close, with the exception of the speckles. I currently have hot pixel set to .35.

Any advice/guidance?

Thanks!

[avajjon]

An easy way to it Material ID pass. If you are lucky you get some good opposite colors. Like Red and Green or Blue.

[jayroth]

Unfortunately, that is too imprecise for our needs. We need black and white, as the matte had a very specific purpose. If those ID colors could be set manually, then that option would have won out.

[avajjon]

Ok I have tried to come up with pure BW solution. I have setup a simple scene with 2 objects. Assigned second object with Layer ID 2 . Enabled render layers. Rendered Layer 1 with Layer Mask pass. And the result is pure BW.

Here is the scene

[jayroth]

Thanks, I'll give it a go tomorrow!