Baking inside walls of a cube I'm doing my first interior scene. In the scene I'm using a cube as the room with a hole to let in some light. I'm using light portal. Every object in the scene bakes well apart from the cube which comes out all white. I have tried to use the backfacing option of the Geometric node but the results are the same. How do you bake the inside walls of a cube for faster rendering?
Select your objects and go into Edit Mode (Tab) and press A once or twice so your whole mesh is selected. Then press Ctrl+F and select Flip Normals. What this does it flips the the direction of what Blender thinks is the outside layer.