Without more details and a complete screenshot of the timeline nobody can tell you anything. We don't even know your version of AE much less any details about your comp, effects used and whatnot.
Sry... AE CC
In my opinion theres rly nothing fancy about! Just a few passes rendered out in cinema 4D!
And as said everything works fine as long as i don´t mask the composition
Do you have the composition set to Ray-traced rendering?