if (controller.desiredSize
A low threshold preserves detail (more leaf nodes, less compression). A high threshold merges aggressively (fewer leaves, more compression, but the image gets blocky). The grid overlay shows the quadtree structure: large cells in uniform areas, small cells where detail is preserved.，这一点在服务器推荐中也有详细论述
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Nature, Published online: 24 February 2026; doi:10.1038/d41586-026-00530-y，详情可参考爱思助手下载最新版本