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+# Changelog
+
+## 0.6.0 (2026-04-21)
+
+### Features
+
+- **Multi-surface material system** — per-surface materials for walls, stairs, roofs with click-targeted 3D editing ([#266](https://github.com/pascalorg/editor/pull/266)) by [@sudhir9297](https://github.com/sudhir9297)
+- **Automatic wall-room generation** — closed wall loops auto-split and generate slabs ([#255](https://github.com/pascalorg/editor/pull/255), [#257](https://github.com/pascalorg/editor/pull/257)) by [@sudhir9297](https://github.com/sudhir9297)
+- **Stair-slab integration** — stair-driven cutouts in slabs and ceilings, auto ceilings from wall loops
+- **Curved fence support** + endpoint move tools ([#267](https://github.com/pascalorg/editor/pull/267)) by [@sudhir9297](https://github.com/sudhir9297)
+- **13 material presets** — granite, marble, parquet, wallpaper, wood and more ([#231](https://github.com/pascalorg/editor/pull/231)) by [@sudhir9297](https://github.com/sudhir9297)
+- **Export scene system** — GLB, STL, OBJ formats ([#203](https://github.com/pascalorg/editor/pull/203)) by [@zephran-dev](https://github.com/zephran-dev), with STL/OBJ groundwork by [@mvanhorn](https://github.com/mvanhorn) ([#175](https://github.com/pascalorg/editor/pull/175))
+- **Street view / walkthrough mode** ([#173](https://github.com/pascalorg/editor/pull/173)) by [@Yashism](https://github.com/Yashism)
+- **Duplicate project** ([#178](https://github.com/pascalorg/editor/pull/178)) by [@kleenkanteen](https://github.com/kleenkanteen)
+- **Editable wall length slider** ([#195](https://github.com/pascalorg/editor/pull/195)) by [@zephran-dev](https://github.com/zephran-dev)
+- **Infinity dragging slider** using PointerLock API ([#206](https://github.com/pascalorg/editor/pull/206)) by [@claygeo](https://github.com/claygeo)
+- **Material system enhancements** ([#201](https://github.com/pascalorg/editor/pull/201)) by [@PMAT77](https://github.com/PMAT77)
+- **Editor layout redesign v2** + 3D box select
+- **Move/rotate building** + relative positioning for all tools
+- **Grid snap toolbar controls**
+- **Cut-out button** in floating action menu for slabs and ceilings
+
+### Fixes
+
+- **WebGPU renderer** — await `renderer.init()` in Canvas GL factory ([#233](https://github.com/pascalorg/editor/pull/233)) by [@b9llach](https://github.com/b9llach)
+- **WebGPU fallback** — skip post-processing when unavailable ([#234](https://github.com/pascalorg/editor/pull/234)) by [@b9llach](https://github.com/b9llach)
+- **Crash on mode switch** — fix crash when switching to Furniture mode ([#237](https://github.com/pascalorg/editor/pull/237)) by [@txhno](https://github.com/txhno)
+- **Crash on duplicate** — prevent crash when duplicating elements ([#239](https://github.com/pascalorg/editor/pull/239)) by [@nnhhoang](https://github.com/nnhhoang)
+- **Delete walls/slabs** via floating action menu ([#180](https://github.com/pascalorg/editor/pull/180)) by [@nnhhoang](https://github.com/nnhhoang)
+- **Counter-clockwise rotation** — T key for CCW rotation on selected nodes ([#184](https://github.com/pascalorg/editor/pull/184)) by [@nnhhoang](https://github.com/nnhhoang)
+- **Scene singleton cleanup** — release singletons on Editor unmount ([#214](https://github.com/pascalorg/editor/pull/214)) by [@geopenta](https://github.com/geopenta)
+- **State management & memory leaks** ([#152](https://github.com/pascalorg/editor/pull/152)) by [@hobostay](https://github.com/hobostay)
+- **Ghost wall prevention** — use WALL_MIN_LENGTH constant ([#168](https://github.com/pascalorg/editor/pull/168)) by [@zephran-dev](https://github.com/zephran-dev)
+- **Catalog image optimization** — add sizes and loading props ([#189](https://github.com/pascalorg/editor/pull/189)) by [@korvixhq](https://github.com/korvixhq)
+- **Code cleanup** — remove unused `@ts-expect-error` directive ([#150](https://github.com/pascalorg/editor/pull/150)) by [@cs68614-hash](https://github.com/cs68614-hash)
+- Robust undo/redo with nested history pause/resume
+- Post-processing recovery after duplicate scene mutations
+- Improved snapping across all geometry types
+- Thumbnails, placement, and responsiveness improvements
+- Stair elevation sync with floor slabs
+
+### Contributors
+
+A huge thank you to everyone who contributed to this release! 🎉
+
+- [@sudhir9297](https://github.com/sudhir9297) — material system, wall-room generation, curved walls, stairs, fences (7 PRs!)
+- [@zephran-dev](https://github.com/zephran-dev) — export system, wall length slider, ghost wall fix
+- [@nnhhoang](https://github.com/nnhhoang) — rotation controls, delete actions, crash fix
+- [@b9llach](https://github.com/b9llach) — WebGPU renderer fixes
+- [@txhno](https://github.com/txhno) — furniture mode crash fix
+- [@Yashism](https://github.com/Yashism) — street view / walkthrough mode
+- [@claygeo](https://github.com/claygeo) — infinity dragging slider
+- [@geopenta](https://github.com/geopenta) — scene singleton cleanup
+- [@kleenkanteen](https://github.com/kleenkanteen) — duplicate project feature
+- [@mvanhorn](https://github.com/mvanhorn) — STL/OBJ export formats
+- [@PMAT77](https://github.com/PMAT77) — material system enhancements
+- [@korvixhq](https://github.com/korvixhq) — catalog image optimization
+- [@hobostay](https://github.com/hobostay) — state management & memory leak fixes
+- [@cs68614-hash](https://github.com/cs68614-hash) — code cleanup