The procedural model of a greenhouse by Houdini. You can change size and shape of the greenhouse. For shape you can use yourself spline (it is important that lower points size is matched main size of greenhouse) and non-symmetry spline. You can add and setting windows (each has gas lift), strengthen the frame, open doors and windows. At export all parts are group by material. The base and cover have UV coordinates. For cover you can use extruded and non extruded grid. There is each symmetry shape at preview like obj.