Tiled 0.15.0 - Bug with automapping using collection of images

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Hi,

I use automap feature but instead of using a tileset I use a collection of images. I create 3 tile layers (regions, output_object, input_object) and 1 object layer (output_object_collision).

Then in my object layer (output_object_collision) I add some shapes and lines.

After that, in my level.tmx I use the automap. At that point, only some objects from the object layer appear. It looks like it depends on the size of the shapes (a rect using less than half the object area don't show and using lines don't appear either.
Here are some screenshots:


Thanks

Reproduce the issue in Tiled using a collection of images, the three tile layers, and the output_object_collision object layer with rectangles and lines described in the report. Start by tracing automapping of object layers and verify that all shapes and lines appear in the resulting level rather than only larger rectangles.

Written by the indexing model from the issue text.