Good luck! I can't imagine the mental tedium that must be endured to master it. Thank you for it! It's definitely, absolutely a very useful tool for painting. It makes big projects a breeze.I understand that with the buttons on the interface. It's annoying for most people and I will change it - I should have changed it now.
I would like to not touch the paint UI, as it is big and puzzling even for me, and I wrote that thing... (I mean, I think I'll do it at some point but def not right now)
I tried many things, including your suggestion there. All of them resulted in the same inability to paint. I'll probably try it on a new world and new character eventually just to test it.For painting: are you dragging your mouse over the UI with your cursor? If so, the UI takes the place and becomes your selected thing, try avoiding the UI with the cursor when selecting tiles to paint