Has anyone tried using Torsten's TIN functions yet? Looks like they will be a great addition to the LISP functions in BricsCad. There are many functions to create tins, add points to a tin, add contours, calculate volumes between tins etc. Evidently, you need BricsCad Pro to use them, but that's a cheap price to pay for all the additional functions (especially since they seem to have LOWERED the prices across the board)