texture memory would be difficult to use because n64 doesnt have any, its unified memory arch.

It has 4k of TMEM on the GPU, and is in fact the only place textures can be used by the GPU.

That's one of the major reasons the N64 has a reputation for being 'blurry'. 4k gives you a max of (with mip maps) one 32x32 16-bit texture at a time.

Not sure what you mean by “any” it certainly has texture ram but to a fault too little so n64 textures are notoriously crumby.