How to create a tilemap with a partial collision mask?

Hello. I’m still learning Gdevelop and learned quite a bit on my own but I can’t for the life of me figure out how to properly use tilemaps. I’m working on a top down game and thought to make a simple 16x16 object of a barrel where the player character can stand in front of, not under if that makes any sense. I want the barrel tile to have rpg maker like collision where the player character can pass through the bottom edge of the tile, but not the top. I created a partial collision in Tiled and exported a .json but I to be honest, I have no idea what I’m doing at this point and need help! what exactly do I do to get this to work??

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Did you take a look at the tile map object doc?

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unless I’m making some sort of mistake, I don’t see anything in the documentation that helps with the creation of partial collision mask

If you mean you want to know how to set up collision mask on a tile set with Tiled, you should take a look at Tiled documentation:
https://doc.mapeditor.org/en/stable/manual/editing-tilesets/#tile-collision-editor

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