Using rhinoceros's subdivision surface function to make a bicycle appearance modeling for friends, this functional modeling method is really very useful, convenient and quick adjustment, the difficulty is to do a good job of wiring, to try to be simple to ensure smooth surface.
Designer: @ Drunk in the light to see the sword

Wiring

smooth subdivision surface

the effect is not bad

Compared with hand drawings, the overall frame has been adjusted a little to ensure that the man-machine is reasonable as far as possible.