+! DropSmallSolids : Eliminate small solids by a) removing them or b) absorbing them by adjacent larger solids.
+! DropSmallSolids.WidthFactorThreshold : Maximum value of 2V/S of a solid where V is volume and S is surface area of the solid.
+! DropSmallSolids.VolumeThreshold : Maximum volume of a solid.
+! DropSmallSolids.MergeSolids : If false, solids are removed; otherwise, solids are merged to adjacent larger solids.
+