[4ian]

Companion of GDevelopApp/GDevelop-extensions#2311 (a "Fill holes" brush, and scattered models selected by clicking them in the scene editor).

What changed

• Extension update: the 3D GTA with a map starter and the 3D island get the Terrain3D extension of that PR. The island had an older version, from before holes.
• 3D GTA with a map: a new gameplay test, "Clicking a tree in the scene editor selects its forest". It casts rays like the scene editor picks objects: on a tree, it hits the forest; on the ground next to it, the terrain.
• 3D island: a new gameplay test, "Holes are made and filled with the brushes of the scene editor". With a stand-in for the editor, it makes a hole with the Hole brush and fills it with Fill holes. It checks the collisions and the layer of the meadow, and also the actions and the fill edit.

Nothing else changes in the projects.

How it was tested

All the gameplay tests pass: 10/10 for the 3D GTA with a map, 11/11 for the 3D island. Both new tests fail with the extension of main:

• GTA: the ray on the tree hits the house behind it.
• Island: there is no "Fill holes" tool.

🤖 Generated with Claude Code

https://claude.ai/code/session_01BJr8NHQoc1VdQ5fSM9TPzT

---

Generated by Claude Code

[github-actions]

Preview the game(s) changed or added in this Pull Request

• https://editor.gdevelop.io?project=https://raw.githubusercontent.com/GDevelopApp/GDevelop-examples/claude/stoic-archimedes-ovjmdi-editor-fixes/examples/3d-island-terrain/3d-island-terrain.json
• https://editor.gdevelop.io?project=https://raw.githubusercontent.com/GDevelopApp/GDevelop-examples/claude/stoic-archimedes-ovjmdi-editor-fixes/examples/starting-3d-grand-theft-auto-with-a-map/starting-3d-grand-theft-auto-with-a-map.json

---

This is an automatic message displaying links to the games in this PR - double check the JSON in case of doubt.