- Download a free trial of T-Splines for Rhino. This advanced tutorial using T-Splines for Rhino 3d guides you through how to make a watertight lawn chair suitable for injection molding. For other T-Splines for Rhino 3d tutorials visit our YouTube page Download the .3dm T-Splines for Rhino 3d version: v2.3 Difficulty: Advanced Commands used in tutorial: 03:17 tsConvert 03:35 tsCylinder 04:00 delete 04:30 tsExtrude 05:08 tsMerge 05:28 tsFillHole 06:24 tsMakeUniform 08:40 tsConvert 10:44 tsBridge 11:45 tsSmoothToggle 12:45 tsExtrude 14:10 tsBridge 15:15 tsUnWeld 16:50 tsExtrude 17:10 tsBridge 17:32 tsFillHole and tsWeld (for 4 sided face) 20:35 tsBridge (1 to 3 edges) 21:40 tsBridge fail then correctly 22:30 tsWeld (on verts) 23:30 tsMakeUniform 24:30 tsLayout 26:35 tsThicken (using crease edge) 28:25 tsThicken (using soft edge) 29:20 tsInsertEdge 30:42 tsConvertToRhinosurf