Use 2D Grid and Checkerboard to verify straight lines, aspect ratio proportion, and barrel/pincushion optical distortion across curved displays.
The 1px Sharpness preset renders alternating 1-pixel hairline lines at 1:1 hardware mapping to detect blurry scaling interpolation or mismatched native resolutions.
Moiré concentric rings expose spatial frequency beating against display pixel pitch and non-integer OS scaling (e.g. 125% or 150% scaling).
Check display scaling, subpixel font rendering, and edge sharpness with 1-pixel alternating line patterns.
Identify Dirty Screen Effect (DSE), vignetting, and uneven backlight distribution.
