User:Owen Burgoyne
I've been an LDraw user for a long time, although spent some time playing with LDD. However, I went back to LDraw for its flexibility and rendering possibilities.
I've put some time into creating new parts of Lutz Uhlmann's LGEO system, used for rendering LDraw models in POV-Ray, although I've submitted a few parts to the LDraw Parts Tracker with my relatively basic grasp of LDraw part design.