This is more obvious on the robot-dragon demo, but it may be the same
thing I've noticed before. If you rotate the model slowly you can see that the
triangles (or the uv coordinates, not sure which) shift in an inconsistent way. If
they all shifted together that wouldn't be a problem, but they're shifting in
different directions so it almost looks like he's "shapeshifting." I think it is the
triangles that are shifting, not their coordinates, because you can see the shift
in the profile of the body, and the edge of the triangle actually moves.
This is more obvious on the robot-dragon demo, but it may be the same
thing I've noticed before. If you rotate the model slowly you can see that the
triangles (or the uv coordinates, not sure which) shift in an inconsistent way. If
they all shifted together that wouldn't be a problem, but they're shifting in
different directions so it almost looks like he's "shapeshifting." I think it is the
triangles that are shifting, not their coordinates, because you can see the shift
in the profile of the body, and the edge of the triangle actually moves.