For what can be used ID output channels without antialiasing?

[Micha]

Hi,

some weeks befor I got the info, that the missing AA of the output channels is not a bug, it's feature. I'm curious, for what can be used the channels with AA?
I have seen mat/object ID channels from other render engine, allways with all blur effects and full AA for postwork masks. Why are the Vray ID masks without AA?

Regards,
Micha

[instinct]

because everything else is pointless. ID channels are integer. An integer value is 1, 2, 3, etc. If you do any kind of conversion to a color value (like a wire channel) then it would still be pointless because you cannot reliably select anything based on these colors. (nope, magic want is NOT an exact selection :P ) The only antialiased way to get PROPER masks is multimatte. It provides 3 masks per element. You can seperate these by simply using the red, blue or green channel as a mono channel.

What they are useful for ? Well if you need to determine RenderIDs ? :P

FaceID would be needed for Barycentric coordinates. But that isnt included if i recall right ?

Regards,
Thorsten