Textures can have mipmaps (And information for using textures)

[LexiBigCheese]

I use a Texture struct that contains a mipmap: bool,
on creation:

if mipmap {
  C3D_TexInitMipmap(...)
} else {
  C3D_TexInit(...)
}

on texture upload:

C3D_TexUpload(...);
if mipmap {
  C3D_TexGenerateMipmap(...);
}
C3D_TexFlush(...);

[LexiBigCheese]

another thing about textures,
make sure their side lengths are some power of two greater than or equal to 8,
and when uploading, swizzle your textures first, https://docs.rs/swizzle_3ds is great for this.