One of the homebrew games I adapted for GGVm uses the quirk of the ppu where a background sprite, hidden by the background, causes pixels of the foreground sprites to drop out. In this particular use case, the background sprites are solid 8x8 pixels. Since my focus for GGVm is 100% the needs of homebrew developers, one game at a time, I did not attempt to simulate the PPU's behavior correctly. In other words, if the background sprite were not composed of solid 8x8 pixels, the behavior would be incorrect.
What I'm wondering is, which (non homebrew) games use this trick, and are there any known instances where the trick is employed using background sprites that are NOT solid 8x8 pixels (i.e. some transparent, some not), and what is the trick used for?
What I'm wondering is, which (non homebrew) games use this trick, and are there any known instances where the trick is employed using background sprites that are NOT solid 8x8 pixels (i.e. some transparent, some not), and what is the trick used for?