Precedence

A flag beats an environment variable beats the file, and nothing beats a change made inside the running app for that session.

Setting	Highest			Lowest
Quality tier	--tier	RLX_TIER	[quality] tier	auto
Grid scale	--grid-scale	RLX_GRID_SCALE	[quality] grid_scale	auto
Graphics adapter	--gpu		[output] gpu	high performance
Preset directory	RLX_PRESET_DIR			the seeded per-user directory
Input mode	--input		[input] mode	loopback
Input device	--device		[input] device	the mode’s default endpoint
OSC target	--osc		[osc] target	—
OSC on/off	--osc (on)		[osc] enabled	off
Control address	--control		[control] listen	—
Control on/off	--control (on)		[control] enabled	off
Console on/off	--console (on)		[console] enabled	off

--input, --device, --gpu, --osc, --control and --console pin a run and never write themselves into config.toml; the file is the persistent form. There is no environment variable for the input selection or the adapter, because both are properties of a rig and already persist to the config.