I am getting this error as shown here each time I tried to intersect these 2 3d features. I am surprised that one of the layers intersected correctly but not others, even when I created them all using same method. The error means the features are not intersected but geographically they are. Does anyone know why?
Also, how can I merge different layers of multipatch together? I am not sure of which tools does that. I ve tried some without success.