Hi Houska,
I attach a free very simple test scene i took from the internet and tweaked a bit.
The scene is working and i created rayswitcher mats which prove, rayswitcher and alpha are working (first attachement and not directly this thread). I also set up Lightselect multipass.
Using the corona image editor, i'm not abble to reproduce the transformation of final Multipass .exr file in .cxr I was talking previously, as i get an error message (cf second attachement): 'STOP@..\...' when opening the final result (.exr multipass) and trying to make a save (not 'save all') as i said below, choosing the .cxr extension .
I'm sure i did succeed in doing this two days ago, but as i also had the max image editor installed, i probably made a mistake and load the .exr file in this app. Not the c4d one. Now i'm not able to test the max editor, as it won't load (45 days free licence is expired for me).
Cheers,
Nelaton