It is known that one cannot nest a composition into itself. But I would like to do a slightly different thing.
I have a composition, and I would like to add a "previous frame of the composition" to itself as a layer.
Is this possible?
You can think of this also the following way. First of all, we arrange each frame of the comp as a still layer. (Layer "Frame N" should be on top of layer "Frame N-1".) And then, as time goes by, we subsequently turn each of these layers on. Maybe this can be done using expressions, but I suppose there might be even better way...