There are some item with size more than 1 x 1. It is difficult to place them in map as objects.
Put them to a map (tile layer) separate from each other.
Export the map as Image.
Run this tool. It will group objects with same size to one image.
| objects_1x1.png | objects_1x2.png | objects_2x2.png |
|---|---|---|
 |
 |
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Then you could create new Tilesets in Tiled with their tile size.
Draw your map with then. Example maps.
