This texture thing reminds me of machined surface micro-finish values or numbers we assigned to them on part detail drawings (AKA, blueprints) for manufacturing. Most finishes were 120 micro-inches, which could be achieved by modern cutting tools. A 250 finish was from rough machining, and was pretty easy to tell because you could see the machining marks in the surface or run your finger-nail over it and just that: rough. If it said 500 to a surface finish mark (think check mark-like symbol) ,that was the result of a cut-off saw or cast iron as removed from a pattern mold. If it said 32 or 16, those were usually achieved by grinding, like bearing mounting surfaces or surfaces that were against seals or O-rings. If it said 12 or 8, those were fine grinding or even scrapping & lapping (Google it), for extremely flat surfaces, like precision ways (dovetail slides against each other) on a milling machine.

If you ever looked at a cast or forged crank shaft from an engine after its been machined and blueprinted (detailed) and ready for assembly into an engine, you can see a wide variety of these surface finishes values on that crank shaft. Blueprinting usually involved chamfering oil holes or reaming drilled oil access holes for a finer finish, grinding or sanding off excess flash from parting lines on the casting or forging, ultra-fine (4000 grit) oil/wet emery cloth polishing of bearing surfaces, and finally dynamically balancing the whole crank on a special machine, which usually involved machining holes to add special weight "slugs" into the existing counterweights/throws for a precision balance.