well i am sure that you ve already checked that:
(1) The Tileset .png file is given with "pink" as backgroundcolor to represent transparent pixels (2) In the tool "Tiled" this is considered automatically. (3) On the Form the surrogate-color "pink" should be transparent. What should be done to make the tile backgrounds transparent...
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* was showing after your thread and my post... and may be that help you (AI of forum is working)