Planet Craft

The mod adds a sandbox for building a custom solar system. In-game GUI tools let players create and modify planets, with settings for name, size, placement, hue, surface material, texture, air layer, glow, corona and rotation speed, all set individually per planet. Planets exist in two forms: large 3D objects placed in the world and 2D planets drawn on a skybox that can replace the sun and moon. The 2D form works on the client alone, so a server does not need to send anything for it.

Planets can orbit other planets or the sun along circular or elliptical paths, and solar system tools build full orbiting systems at once. Planets can carry several rings, each with its own color, material, glow, radius, tilt and speed. Surfaces support RGB colors, imported textures and procedural patterns, and special effects cover warp and black-hole-style visuals. A dedicated space dimension can be reached with a command, and the planet selection screen includes a teleport to any planet.

The whole planet system can be saved to a file and loaded later in another world. Planets are tied to their world unless a saved system is loaded on purpose. The mod is client and server, so the server and every player need the mod. Planet Craft is not open source and is released under All rights reserved. Files are published for NeoForge only, for 1.21.1. The authors recommend not using shaders, and a GUI scale of 3 or lower can reduce visual bugs.