How to create a new custom render channel

[gfxman]

Hi there,
i have a simple(?) question!
I would like to create a custom render channel, that should be always available in all my scenes.
This render channell would be a normalized motion vector pass, for rendering 2d motion blur in after effects.
The idea is to avoid rendering a second pass just for the normalized motion vector.
Is it possibile?

I can't use the raw motion vector pass from mental ray in after effect + reel smart motion blur, i tried to normalize in the adobe application, but i failed.
So, is there a way to create a custom render channel, with my shader, and make it available in all the passes ?

[xsisupport]

The documentation explainshow to create custom render channels.

Or do you already know that and you are asking "how to do it in every scene" ?

[gfxman]

The documentation explainshow to create custom render channels.

Or do you already know that and you are asking "how to do it in every scene" ?

Hi Stephen ( i follow you on xsi-support, great work!).
I already know that method. Or maybe i'm doing something wrong.
I create a pass with the lm2dmv to create the normalized motion vector pass.
I use the "store color in channel" to create a new buffer i call it " my_motion_vector"
Then in my beauty pass i add the in the render channel output " my_motion_vector".
That image results completly black..

i made an image to explain better myself.

[xsisupport]

I got it to work doing pretty much the same thing. But isn't that lm2dmv shader really old? I had some weird behavior (in one pass, the Main channel wouldn't render).