Black and White Alpha channels Tweet

[batman911]

Hi

I'm wondering if I can produce black and white alpha channels instead of material id channels when rendering? The reason is that I find selecting the colours in Photoshop afterwards doesn't produce a nice tidy alpha channel. It would be great to custom make black and white alpha channels for each material individually, whilst doing the render instead of having to choose a different rendering kernel. Is that possible?

Cheers.

[mikefrisk]

Have you tried using render layers?