The red-flash knob shipped documented in the KB and the source comment but not
in the player-facing settings file -- an inconsistency with its sibling
BT_RIO_PROTRUDE, which does carry a block there. It is a persistent player
preference, so environ.ini is exactly where it belongs.
Placed in the cockpit section after BT_COCKPIT_TINT, written as
'#BT_RADAR_FLASH_RED=0' -- commented, showing the OFF value, since the feature
is on by default and turning it off is the action a player would take.
NB BT_LAMPTEST is deliberately NOT added: environ.ini's own contract excludes
test/debug hooks ("they would silently persist across every session"). It
stays documented in context/glass-cockpit.md and at its source.
Verified: the block reads back out of the freshly built btl4.exe verbatim.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>