Bichael BōrupenP
I got the idea for Bichael BōrupenP from artists who really know how to work some ballpoint inks to mark lightly and achieve rendering that's more subtle but with a style still characteristic to ballpoints. I designed it to allow that amount of control.
There were some older attempts at a brush like this before Bichael, but those older attempts (Art BōrupenP) retained the older, slightly blotchy texture.
By contrast, this Bichael was inspired by the mostly clean marks made by a cheap BIC ballpoint on a Moleskine notebook.
When I first learned about it, I was surprised how light these real life ballpoints can go, and how effectively they're used to render. I always grew up thinking ballpoints were a binary writing tool and pencils were the ones with gradation. Actually, come to think of it. I guess I also didn't like it because it took too much hand pressure to actually get the ones I had to mark a reliably solid line.
While researching for this brush, I learned a lot of weird things about the physical properties of ballpoints— stuff like how you kind of make it even lighter by making the ball skid by drawing at a really low angle, and how part of the look is the wobble of the line it seems to roll a chance to cause ink blobs at the start of some of your strokes.
Some of it is unfortunately not something I can simulate with CSP alone. I actually managed to simulate some of these effects using a Lazy Nezumi Pro script. But that's another post for another time.