the primitive cube has each of its sides spanning the entire 0-1 space of the uv’s, while yours is a T-shape.
seperate each side, overlay them perfectly and scale them until they fit the 0-1 space of the uv-map.
the primitive cube has each of its sides spanning the entire 0-1 space of the uv’s, while yours is a T-shape.
seperate each side, overlay them perfectly and scale them until they fit the 0-1 space of the uv-map.