Reply To: Hi Kent, When I try this on one of my examples with either the Alpha Over or the Mix node I only see the latest render la…

[pavelsputnik]

Nevermind, I found out myself. There were 2 things missing:
1. I forgot to set the World background to Transparent in the Render tab (as shown in a previous lesson ^^)
2. I had to reassign the Alpha Channel of the top render layer to the Alpha Over node.