im making a 2d platformer, is there a tile mapper, or do I have to use other software?
Well, You can use sprites to design your level. You could also scale primitive models to make them flat. Other than that, I don’t think there’s a tilemapper in PlayCanvas, none that I know of. You could try using other softwares. I’d be happy to answer any other questions you have 
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There’s no built in tilemapper unfortunately. You would have to write your own importer for something like Tiled.
ok, i got a JSON file, but how do i use it?