Hi Paulemous and thanks.
Good to see that there are other cavers here. Where are yours?
Basically, I'm not sure. The walls are, in places, pretty dark, at an acute angle to the laser beam and/or reflecting light from the entrance - a Disto wont reflect in some places but will in others. It may also be influenced by which reconstruction algorithm is used and the sequence in which one simplifies the mesh so some playing around needed.
I can get round the Autocad response issues effectively by simplifying the mesh without losing the shape; the detail washes out though. So I'm gojng to be doing 2 DXF versions of each scan; hi-res and lo-res.
Please prioritize the need to extend range, Tyson, if you can.It will make a big difference to Sweeps underground capabilities.