Try this free tool for producing helix meshes, it's quick and easy to use, and it's er... FREE! http://www.evolve.co.uk/helixir/ Oh yeah, it only outputs in *.pov and *.unc, which bryce can't read so you'l need this FREE file converter as well, use it to convert the mesh to *.dxf or *.3ds. http://home.europa.com/~keithr/crossroads/