N64 Texture Pack Issue?

[Wiigeek336]

I'm using an N64 emulator and currently making texture packs. However, for some reason, some textures just stay the same, even though I'm 100% sure I edited them. This also happens when downloading and using other ones. For example, in SSB64, most stages only appear to have edited backgrounds and other elements, but the stage textures themselves (the floors, walls, etc.) remain unedited, even though I saw the pack included floor/wall textures. Does anybody have any ideas?