Problem baking uv map

I am trying to make a very simple room in blender that I’m going to import into unity, I realise something this simple could just be done in unity but it’s a proof of concept for a much more complex environment I’m going to do later on so just figuring out how it works just now.

I’ve created 3 materials Carpet, Wallpaper and celling and made a uv map. I then created a new image in the UV image editor, hit a twice in my edit mode screen to make sure everything’s selected then hit bake in the camera/render panel. Only my carpet face seems to have worked properly, when I look at the baked texture everything else is black.

Screenshot of what I’m seeing attached:


I’m really new to blender and am figuring it out with youtube tutorials so it’s very possible I’m making a newbie error, anyone know what I’m missing?

Please supply your demo blend file (with textures) for ALL support questions so we don’t have to use purely guesswork !!