[Delineator]

I've found the only reliable way is to render mattes in another program. Either rgb mattes from lightwave or black and white alphas from modo. In Modo you can set it to render an alpha for any object or material, would love to see something like this in Maxwell one day.

Cant you use the matte option under materials for this?

[lifeofdave]

Not for what I'm after, I don't to remove certain materials from the render so you can see the background, I want a accurate way to select individiual materials/objects in photoshop to add adjustments. Perhaps matte was the wrong word, another way of saying it would be an alpha channel for individual materials.