Add engine roadmap docs for Unreal/Godot parity

README.md

@@ -65,6 +65,8 @@ pod 'Filament', '~> 1.68.5'
   to use the material compiler `matc` and how to write custom materials.
 - [Material Properties](https://google.github.io/filament/notes/material_properties.html), a reference
   sheet for the standard material model.
+- [Engine Roadmap](https://google.github.io/filament/notes/roadmap.html), a renderer-first roadmap
+  outlining engine-style subsystems and feature parity targets.
 
 ## Examples
 

docs_src/src_mdbook/src/SUMMARY.md

@@ -12,6 +12,7 @@
   - [iOS Tutorial](./samples/ios.md)
   - [Web Tutorial](./samples/web.md)
 - [Technical Notes](./notes/README.md)
+  - [Engine Roadmap](./notes/roadmap.md)
   - [Material Properties](./notes/material_properties.md)
   - [Release](./release/README.md)
     - [CocoaPods](./release/cocoapods.md)

docs_src/src_mdbook/src/notes/roadmap.md

@@ -0,0 +1,41 @@
+# Engine Roadmap
+
+Filament is a renderer core first. The roadmap below outlines the engine-style subsystems that sit
+above Filament so it can be used in workflows closer to Unreal or Godot, without expanding the
+renderer itself.
+
+## Planned engine subsystems
+
+- Scene graph / ECS: transforms, hierarchy, culling, component authoring.
+- Input: cross-platform input mapping, controllers, touch, and gestures.
+- Physics: rigid bodies, character controllers, and queries.
+- Scripting: extensible runtime scripting for gameplay and tools.
+- Editor: scene authoring, prefab/asset workflows, and profiling views.
+- Asset pipeline: importers, cooking, dependency tracking, build cache.
+- Audio: spatial audio, mixer, and streaming.
+- Networking: replication primitives and transport integrations.
+- Tooling: build/deploy automation, debugging, and inspection utilities.
+
+## Feature parity checklist (Unreal 5.x / Godot 4.x)
+
+### Unreal Engine 5.4 highlights
+
+- [ ] Nanite tessellation and spline mesh workflows ([UE 5.4 release notes](https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-engine-5.4-release-notes?application_version=5.4)).
+- [ ] Movie Render Graph and render layers for cinematic output ([UE 5.4 announcement](https://www.unrealengine.com/en-US/blog/unreal-engine-5-4-is-now-available)).
+- [ ] Modular and layered Control Rig improvements ([UE 5.4 release notes](https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-engine-5.4-release-notes?application_version=5.4)).
+- [ ] Production-ready Motion Matching ([UE 5.4 release notes](https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-engine-5.4-release-notes?application_version=5.4)).
+- [ ] Temporal Super Resolution upgrades ([UE 5.4 release notes](https://dev.epicgames.com/documentation/en-us/unreal-engine/unreal-engine-5.4-release-notes?application_version=5.4)).
+
+### Godot Engine 4.3 highlights
+
+- [ ] Interactive music resources ([Godot 4.3 release](https://godotengine.org/releases/4.3/)).
+- [ ] 2D physics interpolation ([Godot 4.3 release](https://godotengine.org/releases/4.3/)).
+- [ ] Visual Shader editor overhaul ([Godot 4.3 release](https://godotengine.org/releases/4.3/)).
+- [ ] Direct3D 12 rendering backend ([Godot 4.3 release](https://godotengine.org/releases/4.3/)).
+- [ ] Single-threaded web export improvements ([Godot 4.3 release](https://godotengine.org/releases/4.3/)).
+- [ ] Native FBX (ufbx) importer ([Godot 4.3 release](https://godotengine.org/releases/4.3/)).
+
+### Godot Engine 4.2 highlights
+
+- [ ] AnimationMixer-based animation workflow updates ([Godot 4.2 release](https://godotengine.org/article/godot-4-2-arrives-in-style/)).
+- [ ] TileMap/TileSet performance and UX improvements ([Godot 4.2 release](https://godotengine.org/article/godot-4-2-arrives-in-style/)).