Perforated Holes

Perforated Holes is the speaker-grille pattern: a field of round holes marching across the face you pick, in a plain orthogonal array or in the tighter staggered packing real perforated sheet uses. It is the one texture here that is more often structural than decorative — vents, grilles, drainage, weight saving — so it was built to behave like an engineering feature rather than a picture of one. The holes are emitted as true analytic circles, not many-sided polygons: one circular seed instanced to every centre, so they extrude as real cylinders. Crisp round walls, no faceting however far you zoom, exact diameters you can quote on a drawing, and a cheap boolean even with hundreds of holes. That matters the moment a hole has to accept a fastener or a light pipe — a 26-sided approximation of a 4 mm hole is not a 4 mm hole. Packing staggered offsets alternate rows by half a pitch and tightens row spacing to the densest hex arrangement; grid is a plain square array, easier to align with edges and mounting holes. Depth decides the rest: short of the wall thickness the holes are blind pockets, past it they are true through-perforations, and emboss inverts the whole field into raised pegs. For a real vent set Depth a little over the host wall thickness — exactly equal is the classic way to leave a paper-thin membrane behind. Keep the land between holes (Pitch minus Diameter) at two perimeters or more, around 1.5 mm on a 0.4 mm nozzle, so the sheet keeps its strength. Good for speaker grilles and fan vents, enclosure ventilation, planter and tray drainage, pegboard panels, lightweight plates, filter faces and decorative light screens.