Maps that can't be painted

Hey guy,

Just to make things clear and organized in my head. What are the maps that cannot be painted, the ones that can be painted and the ones that can only be painted?

For instance. Nobody can paint a normal map, right? The computer must paint them for us. Same with cavity maps.

So, what else? Thank you.

Search Google or Youtube. People can and do hand paint normal maps. Other than normal maps, and base colour maps you could in theory paint any other map you please as they are pretty much greyscale images which could be thought of as masks