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In addition to the regular edge collapse, we now allow the simplifier to remove small isolated components. Components that are removed are below the error threshold in size and as such should not noticeably contribute to the overall rendering of the object. This helps simplify topologically complex but small parts of larger meshes and more comfortably reach the LOD targets. In some cases, pruning can cause the last LOD to shrink to 0 triangles which may prevent a slightly larger LOD from being used at the maximum distance; in this case we retry simplification without pruning once.