Post-cleaning resimplification is too disruptive

tile.cpp

@@ -627,12 +627,14 @@ void *partial_feature_worker(void *v) {
 					}
 				}
 
+#if 0
 				if (!(prevent[P_SIMPLIFY] || (z == (*partials)[i].maxzoom && prevent[P_SIMPLIFY_LOW]))) {
 					// there may be another opportunity for more simplification after geometry cleaning
 					geom = simplify_lines(geom, 32, 0, false, (*partials)[i].simplification, 4, drawvec());
 					// in which case we need to clean again
 					geom = clean_or_clip_poly(geom, 0, 0, false);
 				}
+#endif
 			}
 		}
 
@@ -2195,7 +2197,11 @@ long long write_tile(decompressor *geoms, std::atomic<long long> *geompos_in, ch
 					sf.geometry = reduce_tiny_poly(sf.geometry, z, line_detail, &reduced, &accum_area, &accum_hole, &sf, &tiny_feature);
 					if (reduced) {
 						strategy->tiny_polygons++;
-						arg->still_dropping = true;
+
+						// extending zooms without a cap will often extend too far, so don't risk it
+						if (extend_zooms_max > 0) {
+							arg->still_dropping = true;
+						}
 					}
 					if (sf.geometry.size() == 0) {
 						continue;