Limited dissolve many faces I have mesh 700k faces and limited dissolve work bad. File is big, 250 mb. Is some practic to decrease number of faces and not loose geometry?
If you don't want to loose a geometry and overall shape of the mesh you may use a Decimate Modifier to do it. As you can see after setting it up (reducing the Collapse's Ratio factor to 0.15) I reduced the verts count from over 2.000.000 to over 300.000.