I wonder if anyone has ever constructed a real-world replica of a Tron-like grid to see if the visual instability mentioned ~60% down the page isn't caused by being in a very dark environment with very bright lines running across it, rather than an artifact of the display.
The effect happens in a real room with a strobe light going, but that's the same phenonemon - low persistence. It also happens in other virtual settings with lower contrast and brighter overall illumination (although it's less pronounced), so it's not just a matter of a dark environment and bright lines. It doesn't happen in the exact same virtual Tron-like room if persistence is set to full, and it's reduced at half persistence. So it does appear to be an artifact of low persistence.
If you're running "ToastyX Strobelight" (easy lightboost programming utility) on a 120Hz LightBoost-compatible monitor -- hit Control+Alt+Plus to enable LightBoost strobing, then Control+Alt+Minus to disable LightBoost strobing. Control+Alt+1 will program the strobing to 1.4 milliseconds, while Control+Alt+0 will program the strobing to 2.4 milliseconds (oscilloscope measurements). The 1.4ms-vs-2.4ms is actually noticeable in the castle at the top of http://www.testufo.com/#test=photo&pps=1440
It's a very interesting exercise in hacking LightBoost 2D as a programmable-persistence computer monitor (100% software hack; no hardware modifications needed; no 3D kit needed)
