Dear All, RTEdgeBuilder has been completely rewritten. You can now specific objects and elements from where edges begins and edges. The API is about 70% the same I believe. Migration of your code should be fairly easy. Else, ask for help. In any case, the old builder is named: RTEdgeBuilderDeprecated Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.