OrbitalBuilder

Orbital Builder Kit is a fast, art-directable procedural planet generator for Unity. Create stylized or semi-realistic worlds in seconds: continents with adjustable coverage and height, a seamless ocean shell that never gaps at the shoreline, a lightweight atmosphere/fog layer, and beautiful ring presets. Everything is driven from a single Editor Window—with smart randomize for instant exploration and prefab helpers for production.

Key Features

• Continents you control — Coverage %, scale, coast width, and height (FBM-based).
• Seamless ocean shell — Overlap/Inset controls ensure no coastline gaps.
• Atmosphere / fog shell — Color (with alpha) and thickness; transparent, ZWrite Off.
• Ring presets — Saturn / Thin / Wide / Dusty / Broken, plus CustomFromObject to instance your own prefab.
• Geo styles (shape) — Optional mesh shaping modes like Crystal, Mesa (terraced), and Cratered for instantly different silhouettes.
• Randomize — One click shuffles sane ranges (includes geo style, colors, atmosphere, rings).
• Edit or Generate — Build new planets or apply changes to a selected planet in-place.
• Prefab helpers — Save the whole planet or just the ring as a prefab.
• Material-agnostic — All layers are standard MeshRenderers. Use any URP/Built-in shaders; keep your lookdev pipeline.
• Clean hierarchy — Planet_[Name]/_Geo, _Ocean, _Atmosphere, _Ring.
• Robust mesh — Cube-sphere with welded edges to avoid face cracks at large radii.

What’s Included

• Planet Builder Editor Window (C# source)
• Mesh generation & continent displacement (source)
• Atmosphere/water/ring material setup helpers (source)
• Ring mesh + presets and CustomFromObject mode
• Optional lightweight OrbitBody / SpinBody scripts for simple circular orbits and planet spin
• Starter docs (Quick Start + MkDocs structure)