I' very confused as to how download impact is calculated. I created a mesh with 916 triangles. I made LOD models with 771, 516, and 309 triangles each. When I upload my mesh, using all four LOD models, I wind up with a download impact of 15.6. If I switch to using just my low and lowest LODs (516 and 309 triangles), I still get the same download impact of 15.6. I tried removing all sharp edges and completely flattening the UV map to eliminate seams and the download impact actually went up a little. If reducing the number of vertices does not reduce the download impact, what does?