Dear Mike,
you can find the solution of this issue in the ArchiTerra user manual.
Probably you moved you project from a computer to another one or, for some reason, you deleted the needed macro used to display the colored area or you deleted and re-calculated the terrain (so the previous painted area, linked to the original terrain shape don't work anymore).
Simply select the terrain (only the terrain) and then click on the Paint Area tool icon, ArchiTerra will re-generate the macro once again.
If this won't help you, please directly send me the file (
fabrizio.diodati@cigraph.com) and I will send you the solution.
friendly
Fabrizio
Fabrizio Diodati
Graphisoft Italy Srl | Via Rossignago 2/A Spinea Venezia 30038 Italy