GLOCK 29SF. Back and front strap. I call it the Octopus Grip texture. It’s a Japanese thing; you either name it after a reptile or a sea creature with multiple tentacles.
Subtle difference in appearance, but significant for grip while dry and wet, thus, the Octopus Grip texture.
My Google-fu indicates I’m the first to name it as such. Awesome.
I used a soldering iron to test out texturing, but haven’t gotten up the nerve to actually use it yet.