HEIGHTFIELD_RESOLUTION

Vertices per side of a terrain patch. 65 gives a 64-quad patch with a shared edge row, which is what lets neighboring patches stitch without a seam.

Single-sourced here because the streamer, the worker task and capability check 10 all have to agree: that check compares worker output to main-thread output sample-by-sample, so two of them drifting apart would not fail, it would compare two differently-sized grids.

universe/src/terrain.ts:977