20 May 2008 - 11:47Subregions near toposurface boundaries..

This is a trick I learned the hard way. First though, here’s a bit about subregions:

• They are NOT toposurfaces. They are precicely what they are called: SUB REGIONS. The Revit Help File states: It merely defines an area of the toposurface where you can apply a different set of properties, such as material.
• Subregions must be drawn in closed loops.

I have read in other blogs that you cannot draw any part of a subregion’s boundary outside of a toposurface’s boundary.  This is untrue.  In fact, I rarely draw a subregion boundary that doesn’t have some part of it “hanging off the edge” of it’s intended toposurface.  The key is to have MOST of the lines of your boundary on your intended toposurface. I have made a video that I hope explains this procedure.  Enjoy!