This tutorial covers how to use reference lines to constrain or drive radial shapes. In the past I have found this to be tricky when using Reference plane but with a reference line it is quite easy....

This video covers the process of exporting DWG files from Revit. We export a DWG file as a solid for Rhino and I explain the process for exporting Meshes.

Although a little jumpy, this tutorial covers using a line based family to make a parametric awning. As the line is drawn longer you get more awning members. It covers using formulas in families as...

This tutorial covers how to add angle parameters. In this case we put them in a curtain panel to break from such an orthogonal grid. Here are they a tilted mullions but one could imagine using a...