All avaliable (/unavaliable) options for creating tilemaps?

[lidnariq]

I found nocash's description to be the clearest one.

In short, it lets you address the SNES's memory as 256x1 pixel bitplanes instead of the odd interleaving per tile.

[HihiDanni]

So what is a typical use case scenario for doing the 256x1 writes? I remember playing with these registers hoping to find a way to optimize for streaming new sprite graphics but it doesn't seem like that's what the address remapping is for.

[93143]

Well, psycopathicteen used it to render some 2bpp bullet hell tests in software on the S-CPU; it's easier than dealing with tiles.