Few days ago i got the idea again to make objects with a radius within the level is appearing parts by part. like a lantern lightsource.
Knowing that this is less possible i once made an effect with layers... but i could hit myself for not knowing anymore how i did this in the past
There are a couple of ways of doing this, but the coolest way I've seen is to:
1. Make a new top layer
2. Give it the subtract shader effect
3. Add a white background object to it and resize it to the size of the frame
4. Add black objects on top to cut hole in it, ideally with faded edges using alpha channels for smooth looking light