Just like Magic Markers, they would be VERY useful.
In popular art games, (e.g, ^PaintLu), me and other people make use of our space on the canvas. Pretty much using all the space we can.
When making big pieces of art, filling it in is a nightmare.
“Well, why not use paintbrushes?” Well, yeah, duhh. But I’ve seen that most art rooms, and most the times with the makerpen, spawning in a brush and having to deal with the laggy makerpen UI to recolor it every time you want a new color.
For art rooms, it’s even worse. Most art rooms have limited ink (since most, if not all, use R1.) They usually just do the main rainbow colors, and sometimes shades of brown, black, and white.
My concept for the Magic Paintbrush is so.
The wonderful paintbrush, and then the button from the magic marker for the paintbrush.
I have no idea I wrote this whole essay for one item, but I think it’s reasonable to add.
Also, I found a post that also talks about this.