automatic mask/alpha creation

Hi,

i really wish to know if there is a way to generate masks or alpha or RGB selection [like VRay multimatte] render pass or better to implement the great new approach Cryptomatte [ GitHub - Psyop/Cryptomatte: Cryptomatte Nuke plugin, Fusion plugin, sample images, and specification ] so we get render pass as masks for Geometries or materials.

i am really in need of a feature like this to give me the ability to do post works on my rendered movies.

Any luck with this ? Having issues with alpha channel while exporting panoramic sequence…any info would be great.

finally Cryptomatte is here. ue4 2.26
1:06