  We demonstrate three-dimensional track reconstruction of electrons in a low
pressure (50 Torr) optical TPC consisting of two glass GEMs with an ITO strip
readout in CF4 and CF4/Ar mixtures. The reconstructed tracks show a variety of
event topologies, including short tracks from photoelectrons induced by 55Fe
5.9 keV X-rays and long tracks from gamma ray interactions and beta decays.
Algorithms for event identification and track ridge detection are discussed as
well as multiple methods for integrating information from the camera image and
ITO waveforms with the goal of full 3D reconstruction of the track.
