Heightmap terrain 1.6.1 3D Tools 3.3 Community

Submitted by user Zylann; MIT; 2022-06-24

Heightmap-based terrain for Godot 3.3 and later.
It supports collision, texture painting, colouring, holes, level of detail, and grass.

Fixes in 1.6.1:

- Fixed static typing error in terrain importer dialog (thanks to McSpider)

Changes in 1.6:

- Added island modifier to the terrain generator
- Added option to add the current heightmap to the generated one in the generator
- Added `render_layers` property to expose the same as `VisualInstance.layers`
- Added `anisotropic` parameter to packed texture importers
- Added support for loading terrain maps imported as `Image`, allowing modification in game
- Added basic support for pen pressure (tablets)
- Added random brush rotation
- Added brush multi-shape randomization
- Added brush spacing based on time and distance
- Added support for importing `.xyz` files as heightmap
- Added rotation and centering support
- Increased brush size slider maximum to 500, and allow up to 4000 if typed in (expensive, use at your own risk)
- Ported quad tree code to GDNative for a bit of speedup on Windows and Linux (thanks to tinmanjuggernaut)
- Prefixed ALL internal classes of the plugin to prevent clashes with `class_name` (see issue #313)
- Added workarounds to allow the plugin to initialize even if assets are not imported yet (The UI might still have issues, in this case you need to restart Godot)
- Dropped support for Godot 3.1 and 3.2 due to engine crashes.
- Fixed grass chunks not updating properly when the terrain is moved
- Fixed invalid index error that can happen in some cases in the TextureArray importer mode
- Fixed loading an existing texture array when the current texture set is empty
- Fixed `BaseButton.focus_mode` warning printed when the plugin is enabled
- Fixed some dialogs going outside window if editor font is larger (buttons outside windows did nothing)
- Fixed flatten brush not allowing to set decimal heights
- Fixed wrong shading in `multisplat16` shaders

Previous changelogs: https://github.com/Zylann/godot_heightmap_plugin/blob/master/CHANGELOG.md