TemporalShift bug
User aims to animate difference between time t and time t+1 using TemporalShiftScale and python calculator. Input is time series of vtu files.
The problem is that after the initial creation of the pipeline, which appears to work as intended, the difference field resets to zero whenever the user moves through time. Mathieu Westphal suggests problem may be a bug in TemporalShift.
More complete discussion of the problem can be found here.
Paraview state with input files to reproduce the problem can be found here.