Multiple textures per block option for texture packs.

Mods like Optifine add the option for texture variety in blocks on Java edition. This is feature would be great on bedrock for texture pack creators who want to add, for example, a rock in the texture of dirt or add a slight color variation to a single brick on the brick block. Simply put, this feature would satisfy the player's urge to have a little more flavor when using texture packs.