[TRACKER] BaseMaterial3D (StandardMaterial3D + ORMMaterial3D) issues

[Calinou]

This is a tracker issue for the default 3D material implementation in Godot 4.0 (formerly SpatialMaterial). BaseMaterial3D provides StandardMaterial3D and ORMMaterial3D.

This tracker only tracks issues in the master branch, not 3.x.

### Bugs
- [ ] https://github.com/godotengine/godot/issues/14403
- [x] https://github.com/godotengine/godot/issues/48123
- [x] https://github.com/godotengine/godot/issues/49841
- [x] https://github.com/godotengine/godot/issues/50124
- [x] https://github.com/godotengine/godot/issues/50231
- [ ] https://github.com/godotengine/godot/issues/50232
- [x] https://github.com/godotengine/godot/issues/53444
- [x] https://github.com/godotengine/godot/issues/55161
- [x] https://github.com/godotengine/godot/issues/55771
- [x] https://github.com/godotengine/godot/issues/56008
- [x] https://github.com/godotengine/godot/issues/56332
- [ ] https://github.com/godotengine/godot/issues/56574
- [ ] https://github.com/godotengine/godot/issues/63675
- [x] https://github.com/godotengine/godot/issues/61730

### Missing features compared to `3.x`'s SpatialMaterial
- [ ] https://github.com/godotengine/godot/issues/51625

### Proposals
- [ ] https://github.com/godotengine/godot-proposals/issues/1230
- [x] https://github.com/godotengine/godot-proposals/issues/1242
- [ ] https://github.com/godotengine/godot-proposals/issues/1843
- [ ] https://github.com/godotengine/godot-proposals/issues/2316
- [ ] https://github.com/godotengine/godot-proposals/issues/2455
- [ ] https://github.com/godotengine/godot-proposals/issues/3021
- [ ] https://github.com/godotengine/godot-proposals/issues/3499

[mrjustaguy]

56574 is missing here.

[TokisanGames]

Shouldn't these issues be on the GD4 roadmap? Also some of them are out of date, eg #56008 which has been fixed. And here's a new one: #63675