I have Poser 3. (1) I made a posable tube, as 32 segments, all with the `curve' property in its .PHI file. Its ends are open with loose polygon edges. This is intended as a way of creating and posing tubes as parts of models, e.g. as a part of a spaceman's breathing apparatus. On posing, I found that the root segment was strangely deformed: it was pushed half inside itself like a sock which has been turned half inside out. (2) I found that, if I bend a "tail" of curved segments too sharply, it gets flattened and its rings of component vertexes run diagonally across it and not straight. Bending so sharply is not needed in animals' tails, but was a thorough nuisance when posing a tube to be part of a spaceman's breathing apparatus. (Likely the same would arise when posing a coiled snake.)