Rounded Corners Sun & Moon
This compact resource pack makes minimal but noticeable changes to Minecraft's appearance—it transforms the textures of the Sun and Moon. Instead of the familiar pixelated shapes with sharp corners seen in the vanilla version, you get celestial bodies with smooth, rounded edges.
Although the resource pack is created for Minecraft 1.21.4 (format pack format 46), it's compatible with many other game versions. When installed in other versions, the system may mark the pack in red and indicate that it's intended for a newer or older game version, but this won't prevent it from working perfectly.
Enjoy the pleasant visual changes in your game!