Normal map support - Githubissues

Hello there,

Thanks a lot for making penumbra! I know this project is not very active at the moment. I just wanted to know whether penumbra supports normal maps in any way.

I can't understand how this works enough to know whether it would be possible or not. I would be willing to implement whatever is missing for supporting normal maps, but I would probably need a nudge towards the right thing to study/research.