Calculation will run with almost 2-fold (Dual Core) or 4-fold (Quad-Core) the speed.
Calculation will run up to 16-fold the speed. (Requires multiple networked sufficient PCs; Special Installation knowledge required.)

Vertical raster (HH) defined thru the z coordinate of the edge points of the layers as height above ground. Default is: 0 3 6 10 16 25 40 65 100 150 200 300 400 500 600 700 800 1000 1200 1500.