GStarICAD Professional can create and edit 3D Solid however GStarICAD Standard can' t. GStarICAD Professional is recommended if you need 3D Solid design or open 3D Solid drawings; GStarICAD Standard is recommended if there is no 3D Solid. 3D poly and 3D planes are supported in GStarICAD Standard. Click here to see the two versions CAD differences.