To answer my own question: the program was LdrDat2Obj[0] and it had an option to ignore stud.dat references inside brick definitions when exporting designs to .

To answer my own question: the program was LdrDat2Obj[0] and it had an option to ignore stud.dat references inside brick definitions when exporting designs to .obj (you'll still be carrying all the weight of the unseen internal connection shapes but it still represents a pretty huge poly savings to exclude the top studs on export) [0]http://www.pearse.co.uk/lego/links/ldrdat2dxf/ http://www.pearse.co.uk/lego/links/ldrdat2dxf/