Alpha with Roto

#1

Hello everybody.
I just switched to Nuke from AE.
I am training with roto, no problem with it.
But when I want to use my roto as mask for my merge layer, there is no Alpha, all still black.

Thank you for your help ! =)

#2

I would expect a keymix not a merge in this case. Maybe
check “autoalpha” in the read node properties bin.

#3

Yea, I just followed Nuke official tutorials.
Thank for your help Kyrgr it works perfectly !