SUMMARY

Outline drawings remain the standard currency of footprint illustration, but their simplicity entails a tremendous loss of information.  Analyses based on such interpretive drawings, no matter how sophisticated, will always bear the risk of reaching conclusions that cannot be substantiated from the original material.  Footprints of dinosaurs and other tetrapods warrant illustration, recording, and analysis with all the detail that current technology allows.  Only when tracks can be captured in their entirety with minimal distortion can we expect to synthesize meaningful interpretations of the morphology, movement, and sedimentary interaction that created them.  Anaglyphs offer a compact, scale-independent format for combining the strengths of each of the three available perceptual depth cues, and represent a step toward taking paleoichnology away from its 2-D past and into the third dimension.