Oil Brush Impasto Scaling option?

[mr_reidpants]

Hi again, I'm back.

I've recently been developing some work that's meant to be printed largeish (~4 feet wide) at 300 dpi, but I've found that at 300 dpi the simulated brush texture is almost invisibly small. Is there a way to just scale that up semi-smoothly? For example Painter's thick paint brush crap has that "Brush Density" slider that increases the number of bristles that it simulates for a brush of a certain size, at a computational price. It's sort of heartbreaking because I vastly prefer the way AR's impasto works, but at 300dpi it looks like I'm painting impasto with kolinsky sable. How plausible would it be to take the existing brush texture that's applied on strokes and just scale it so the impasto grooves are normal brush size at fancy printing pixel densities?