Hey,

just a short question here. When I output a sequence in open exr and load it into after effects, the backround is just an alpha. What am I missing here? Of course I enabled “render light geometry” etc. It is also visible when I load the sequence into the houdini comp network.

Did you ever find a solution to this? I'm having the same problem (noob problem I'm sure.)

This is actually a feature.

The light background does not get an alpha, it's only written to RGB, so that you can comp the objects without rendering an extra matte.

If you need the alpha to be solid white for the whole frame, you can tick that on inside After Effects' “interpret footage” I believe.

Yes, it works. And I see your point. I just need to approach Houdini with a slightly different mindset than other 3D apps.

Thanks.