Ah, the response from tyrone in the reddit thread you linked clears it up a bit i think? I'll have to try it out later but i think i understood enough to replicate it. When i experimented with the paintbrush earlier i was honestly not getting any of the results i expected, but it was my first time trying anyways '^^
Up until now, i only used the basic select, fill and delete tools that i bound to hotkeys, simply because they substitute the work i find most tedious to do and don't require much thinking - I'm new to using "advanced" world edit tools in any game ever, so i kinda put off using them as long as i got along fine with the basic stuff i already knew and understood...
When i opened the GUI today for the first time i found it very hard to use (mostly because the permanently active cursor mode really f*cked with the movement controls i'm used to), but i think i might be sloooowly getting accustomed to it?
I can't provide you with the original input/output sadly because the log isn't there anymore, but i could theoretically recreate the situation again and take a video/screenshot if that helps?
Happy to see someone replying so quickly in any case, so no worries about the post timing