*STL2 r1, r2
STL tolerances
*STL2 is used in conjunction with the new *STOL algorithm for Versions 2018.2+. The new STL expander preserves angles between faces and edges, which the old algorithm—still accessible using *STL1—did not. The tolerances set by r1 and r2 are to handle near-singular cases. The r1 tolerance is set for a 3D near-singular case, for nearly parallel planes that meet at a single vertex. The r2 tolerance is set for a 2D near-singular case where two nearly parallel planes meet a single vertex. The default values for both r1 and r2 are 0.1. Poor tolerances for ill-conditioned STLs can expand the STL in unexpected directions.
Required card: *STOL