On my CRT it leans right a bit when I'm tracking the lines. Seems right for fps = refresh rate. The slant seemed to reverse when my eyes were moving left, and the moving line split into several lines. Easy way to control your eyes smoothly is to track the cursor, instead of the lines.Chief Blur Buster wrote:I've created a modification of the TestUFO Blur Trail with preconfigured settings & an easier Full Screen Mode (just click anywhere once). I've now retroactively edited my earlier posts to include this link. It's called TestUFO Scan Skew.
http://www.testufo.com/scanskew
Try this on all kinds of screens, even your phone & tablet. (The popup message won't disappear yet on mobile devices, but ignore that for now). You can pinch zoom, and try all screen rotations/orientations to see how scan-out skew changes on your phone / tablet.
Perhaps you simulate infinite refresh rate by predicting where the moving line will by by the time the scanline gets to the desired row?