> I've recently started playing with X3D output and Postgis... (snip) > Any reaction, comments and/or help are welcome ! :) OGC Simple Features 1.2 (http://portal.opengeospatial.org/files/?artifact_id=18241, then click-through licence) introduced POLYHEDRALSURFACE and TIN Well-known Binary and Well-known Text representations. Would these be useful? M