These are true 4K files: 3840px on the long edge, rendered at that size rather than enlarged from something smaller. If you have ever downloaded a wallpaper labelled 4K and found it soft when it filled the screen, that is the difference — upscaling adds pixels but no detail.
They work on any desktop: Windows, macOS and Linux, single monitor or multi-monitor. On an ultrawide the 16:10 framing crops cleanly from the centre because the compositions are built around a central subject with texture carrying the edges.




Palette-knife painting lives or dies on the ridges — the raised edges where the knife lifted off the canvas. Below about 2K those ridges average out into mush and the image reads as a blurry photo. At 3840px they stay crisp, which is the whole reason to hold the files at this size.