Hey,
the asset pack is really great.
But I have a couple of problems with the layer system. When I turn off the draw function to use the layer function, post processing is not being applied after a room switch.
Also the apply function randomly starts showing "layer_effects_id" as an error but also shows it as correct sometimes. Maybe that has something to do with it.
I followed all the steps in the layer section of the documentation and I can't find the error :D