Carrara is trying to smooth the polygons. The simple fix is to open it in the Carrara Vertex Modeler, select all and choose Crease Edges from the selection pull down menu. Hexagon actually has the polys in the same place as shown in Carrara but they're not visible since it handles construction differently. (C5 is a much more similar to Hexagaon now but Hexagon is still a better modler) Mark