Reliable flicker is capped near half your display refresh.
Nonzero makes rings expand, spokes rotate, gratings translate.
Presets
Keys: Space pause · H hide UI · P panel · F fullscreen · Esc stop.
Nothing leaves this machine. Settings are stored locally.
PHOTIC LAB
endogenous visual-pattern elicitor · v1.0
This tool drives your visual system with flicker and adaptive patterns. The geometric
imagery it can bring out is generated by your own visual cortex — the same family of
"form constants" reported in hypnagogia, migraine aura, and at the edges of altered states.
⚠ PHOTOSENSITIVITY WARNING
Flicker between roughly 3 and 30 Hz can trigger seizures in people with
photosensitive epilepsy — including people who don't know they have it (~1 in 4,000).
Do not use this alone. Have someone nearby who can stop it.
Stop immediately at any aura, nausea, headache, eye pain, or disorientation.
Dim the room; don't use at maximum screen brightness.
Skip it entirely if you have a seizure history, photosensitivity, or are unsure.
Any display can be a trigger, but especially full-screen, high-contrast, full-field flicker.
By continuing you agree that you're using this at your own risk, understand the warning
above, and won't hold anyone else responsible for the outcome.