This issue was found a while ago and I haven’t been able to solve it at that time. After switching the tileset image from one size to another size, white tile blocks start to appear in the tileset file, and they cannot be removed by restarting Tiled. These white blocks also called placeholders will cause errors in Unity with SuperTiled2Unity installed. The only way I found working so far is to directly edit the TSX file in Visual Studio, manually changing the tile count and removing empty tiles.
This is not a bug, but a feature :]
These placeholders are added to keep any properties (custom properties, terrains, animations, etc) on tiles that have been removed by the resize. This is intended to prevent data loss in case of accidental or temporary deletions (e.g. when scaling the image). If there is no data attached to the tiles, nothing about the Tileset will change, and reloading the tileset in Tiled will stop displaying them. If they persist, that means there is data associated with those tiles that you should remove if you truly want them gone.
That said, I do think Tiled could make some useful changes:
- make it clearer that the white tiles are placeholder, perhaps by displaying “(Placeholder)” next to their ID in the Tile Properties
- Provide an Action to remove all data associated with placeholder tiles, so that it doesn’t need to be done manually. If rearranging tiles also results in “permanent” placeholders, this should change the order to remove them as well, even if it means the rest of the tileset becomes misaligned. Such an action can be scripted, but I feel it should be a native feature.
It’s also confusing that placeholders are displayed even when no removed tiles had data associated with them or were in use, even in those cases where the loss of tiles is temporary. I’d rather see placeholders not added when none of the tiles need them.
1 Like
ohhh, I see. Thanks for the clarification.