# Heat-time bullet model + virtual-pillar removal A/B (6 arms x 10 runs x 7 rounds).
#
# `git archive HEAD` now has BOTH changes in their shipped state: the virtual
# centre pillar is REMOVED (d0750ab) and the time-indexed bullet heat is OFF
# (fca8993). So the PRE-change mover has to be reconstructed with env.
#
#   old      = pre-change mover: virtual centre pillar ON, flat bullet heat
#   pillaoff = shipped default as of HEAD: pillar removed, flat bullet heat
#   tauN     = pillar removed + time-indexed heat with tau = N ticks
#
# old vs pillaoff  isolates the PILLAR removal.
# pillaoff vs tau9 isolates the HEAT-TIME change (tau9 is the default tau).
old | TR_TFIL_PILLAR_ON=1 TR_TFIL_HEAT_TIME=0 | pre-change mover (virtual centre pillar ON)
pillaoff | | shipped default at HEAD (pillar removed, flat bullet heat)
tau3 | TR_TFIL_HEAT_TIME=1 TR_TFIL_HEAT_TAU=3 | time-indexed heat, tau=3 (short corridor)
tau5 | TR_TFIL_HEAT_TIME=1 TR_TFIL_HEAT_TAU=5 | time-indexed heat, tau=5
tau9 | TR_TFIL_HEAT_TIME=1 TR_TFIL_HEAT_TAU=9 | time-indexed heat, tau=9 (shipped default tau)
tau15 | TR_TFIL_HEAT_TIME=1 TR_TFIL_HEAT_TAU=15 | time-indexed heat, tau=15 (long corridor)