Full HD on a 4K monitor looks worse than on a Full-HD monitor.
This happens due to blur always added by monitors and graphics drivers when scaling, though at integer scaling ratios (e. g. 2 in case of FHD→4K) it could be avoided.
As a result, sharpness in 3D games is decreased, white lines are gray, and pixel art is not pixel art anymore.
Each logical pixel could be displayed as a square group of integer (2×2, 3×3) number of physical pixels of the same color.
Such lossless scaling could be built into graphics drivers, but this is still not done though 4K monitors are on the market since 2014.
- Sign the petition for nonblurry scaling in graphics drivers.
- Vote for adding the feature to the AMD graphics driver.
- Express your support in forums: nVidia, AMD, Intel.
- Complain of blur to technical support of your GPU vendor: nVidia, AMD, Intel (1, 2).
- Complain of blur to technical support of your monitor manufacturer.
- Request the feature for game engines Unity, CryEngine.
- Tell about the issue to as many people as possible.