I am impressed, that it managed to crunch through an 8 millon polygon mesh is quite frankly amazing.
Rhino used 11GB of ram, the result is over 260.000 lines and Rhino became very slow. The calculation took 48 minutes for the perspective view:
I export the lines to Rhino 5 format and the file is 94 MB.
If I export as DWG the file is 22 MB.
Can you optimize Rhino’s line storage? This will be quite important IMO when people start using Rhino6 and make2D on large scandata.