I noticed there’s only rectangular grids for the Tilemap. I know they will probably add hex and isometric grids later down the road, hopefully sooner rather than later. I cannot wait however, so I was wondering if it is possible to define one myself without losing Tilemap functionality and doing it completely separate.
Thanks in advance!
I tried subclassing Grid at one point to see if I could reuse the structure for a game prototype that needed a triangle grid, but realised that it’s really not designed to be extensible right now. Functions are private that should be protected - that sort of thing.
Official support for Hex and Isometric grids would be super useful so I can add further compatibility to my Tiled TMX Importer project 
Thanks Dunk for the reply. That’s a real shame, hopefully they will make it extensible in the near future!