Is your feature request related to a problem? Please describe.
You have some excellent stone small-brick patterns, but none that match the vanilla "Running bond" type, so I can't mix some granite, packed mud bricks, dripstone, or mangrove bricks into my walls for texturing.

Describe the solution you'd like

There's a few different ways to add more texturing to the baked-clay vanilla brick walls, my preference is for all of them (lol) but not my expectation:

• Add brick variants. Worn-out (with chunks of the bricks darker, or replaced with the mortar color, dirty (with most of the bricks much darker and desaturated from soot), cracked, and/or subtle variations on the brick colour (quite-yellow ochre, darker red, and brown are common real-life colours for fired brick).
• Add stone variant textures to the vanilla stones that match the bricks pattern, with and without mortar. You have "Small iron block tiles" which fit vertically but not horizontally, and don't blend well with the regular bricks. Granite, dripstone, mangrove (?), and packed mud would help, although doing the entire grey palette opens up a lot of options for gradients (blackstone, deepslate, basalt, mud, etcetcetc).
• For the ambitious, doing a "brick pass" on the 16 saturated colours series would be fun (adding one texture with mortar and one without for each of wool, terracotta, concrete powder, concrete)

I'd do a pull request and take a stab at it but I can't make heads or tails how the Rechiselled magic works.