🔧 Editor

Editor extension that adds SubTerrain sculpting and painting tools. Creators get raise/lower, smooth, flatten, hole, noise, slope, path, and set-height brushes plus a paint tool for control maps, with live previews and a status HUD. It is built around a base brush tool that does hit tests, compute shader dispatch to height and control maps, dirty region tracking, and undo, with small subtool classes and UI widgets for settings and brush lists.