Atlas Merging Tool not working

[filippo-fornai]

Godot version

v4.1.2.stable.official [399c9dc]

System information

Windows 11

Issue description

Atlas Merge Tool is supposed to create a texture composed of the different textures of the chosen atlases. Instead it creates a transparent image of the right size

Steps to reproduce

Hp: Using 64x64 tiles png images. Every tile is a single image.

1. Create a new TileSet
2. Resizing Tile Size from 16x16 to 64x64 ( as the Tiles used are 64x64 )
3. drag and drop multiple images into TileSet tab
4. Images get imported without tiles created (possible problem?)
5. Manually create tiles clicking on [...] for each tile and selecting "Create Tiles in Non-Transparent Texture Region"
6. Use "Atlas Merging Tool" to create singular atlas from single image atlases
7. While selecting multiple atlases the preview of the output is empty
8. Click Merge
9. The resulting texture image is transparent, the atlas has correct size

godot_github_issue.mp4

Minimal reproduction project

Github_issue.zip

[kleonc]

Duplicate of #80870, fixed since v4.2.dev4 by #80943 (which is marked for cherry picking to 4.1).

4. Images get imported without tiles created (possible problem?)

This part is also fixed since v4.2.dev4 (by #79678, not marked for cherry picking to 4.1).