Files
RP412/MUNGA
CydandClaude Fable 5 34abf40e7f Fifty hertz is the physics
RP412PHYSICSHZ defaults to 50: the simulation advances in fixed 20 ms
steps whatever the display does, and every machine plays the same race.
The proof preceded the promotion - a scripted lap with a crash, a burn,
a tumble and two respawns runs bit-identical at 30, 60 and 144 fps, and
identical runs reproduce exactly, neither of which was ever true of
this engine at any frame rate.

Fifty because it is exact on the engine's millisecond clock (a rate
like 60 quietly becomes 17 ms steps wearing the wrong name), and
because its settled hover ride height measured closest to the
frame-coupled physics the game has always run - the least change of
feel for the most change of correctness. The pods' 25 and the smoother
100 stay one line away for the play testers, and 0 keeps the original
frame-coupled behaviour for comparison, where the frame rate is part of
the simulation.

Carried-over environ files do not mention the option, so existing
testers get 50 on their next build and rpl4.log names both the option
they have not heard of and the mode every launch.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-08-09 22:05:45 -05:00
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