[Auto] [Update] Documented built-in collisions and runtime tile editing for the External Tilemap object

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This PR was automatically generated by the Update docs from GDevelop commits workflow.

An AI coding agent analysed recent commits in 4ian/GDevelop
and updated the documentation to reflect user-facing changes.

GDevelop commits covered

9ed644c80 Fix steamdeck controller not working when exporter to Steam (#8906)
6a849d08d Fix sentence parameters of a tile map action (#8908)
0ad8a003b Fix default tile map assets not showing up (#8907)
8462a17fc [Auto PR] Update translations (#8902)
38ec71fd5 [Auto PR] Update translations (#8902)
67faeca0f Fix context menus for custom objects & drag/scroll conflicting on mobile (#8896)
35599ad36 Fix resource loading project properties reverting to default values (#8905)
9ef4a53e6 Bump newIDE version
7cac72d29 Fix a crash of the side panel (#8904)
eb7d890a7 Improve panel sprite performance when not smoothed (#8901)
d01b27dc3 [Auto PR] Update translations (#8899)
05d4cca9f Bump newIDE version
a2ede481a Show a placeholder for broken or missing images in the shop (#8888)
307d2eeb4 [Auto PR] Update translations (#8897)
84721ed64 Follow up improvements sprite list (#8898)
9475fc4a6 Fix list of sprites of an animation so touch devices can properly scroll (#8885)
599096cc5 Search assets by their author name in the asset store (#8887)
95057c7dd Save side panel collapsed section state (#8878)
5a1c9c7f1 [Auto PR] Update translations (#8891)
cb5429073 Report the behavior name add_behavior assigned (#8895)
94b3b223f Less fatal errors for Editor Functions (#8894)
5cf08a0a1 Bump the max number of function calls
1609e2372 Add support for experimental script-based agents (#8893)
8dd5da42d Add test projects for the documentation (#8889)
8bce5ef1e Fix storybook
751d64934 Keep explicit empty string operand when rendering event scripts (#8890)
223edb68e Improve object list, project manager and other lists by having top header sticky, including sub-folders (#8880)
1a1bbb903 Fix double menu opening when right clicking in event sheet or animation thumbnails (#8883)
172c755cc Allow creating a group before objects added to it (#8882)
98eab7f91 [Auto PR] Update translations (#8874)
a165fec8c Improve sprite editor performance, especially when having a lot of animations (#8877)
2e6ada9c9 Focus the closest tab when closed, instead of the home (#8879)
17c9c604b Add search Resources tool (#8865)
a462fa46c Optimize tile map trimming (#8876)
561c43464 Allow to edit external tile maps at runtime (#8830)
0f0450577 Enhance CLI export behavior with diagnostic error handling (#8864)
905ad8151 Fix importation of extensions with dependency between them (#8875)
bfe1bcc31 Run CLI commands in the live editor when the project is already open (#8847)
5b819bcdc Mention the Android file format ".AAB" in the Android export dialog (#8873)
e198d71fb [Auto PR] Update translations (#8866)
48b3de60c Fix not encoding urls properly, leading to resources not loaded on mobile apps (#8870)
ba15395cd Do not render the auto-declared loop index variable as a local declaration (#8869)
b15ee15b5 Match objects with unicode names in EventScript source view filters (#8868)
17451c960 Allow building GDevelop for dev environments (#8867)
62756638d Experimental more robust events generation (#8863)
5f6168be8 Add and split tests of EditorFunctions + fix layer instances deletion (#8862)
2901e773c Fixes of put tool when erasing and wrong id-object match (#8861)
c9fdf9851 [Auto PR] Update translations (#8849)
fbc26bf75 [Auto PR] Update extension translations (#8857)
a1f21d086 Expose in app tutorial state to url (#8859)
de61eaf86 Fix variable parameter "add or edit" auto-completions (#8856)

The AI agent summary is:

Documentation changes made:

• docs/gdevelop5/objects/tilemap/index.md — Documented that the External Tilemap object can now generate its own collision mask directly via the new "Enable collision" and "Class filter" properties (no separate object required), and added a section noting that its tiles can now be read and modified at runtime (set/flip/remove tiles, resize the grid).

Skipped internal/CI-only commits (rendering performance, Steam Deck controller, editor AI script agents, translations, tests).

Please review the changes carefully before merging.

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Project	Deployment	Actions	Updated (UTC)
gdevelop-wiki	Ready	Preview	Jul 30, 2026 9:04am