The cell size defines just that, how large the cells are - usually tiles can be the same size, but it isn't a must.Īlso, there are no defined dimensions for Tilemaps, nor there are minimum or maximum cell coordinates, you can paint tiles anywhere on Tilemap, like on coordinates -100,-5000 or 3,5 and tiles also have z-depth value. Grid is just a grid, defining placement, orientation and cell size of Tilemaps under it. You could even rotate Tilemaps relative to Grid, but it doesn't make any sense. As Unity is a 3D engine and uses 3D scenes to place objects, you can place the Grid anywhere and rotate / scale it as you wish. Tilemaps are child objects of Grid and they store the actual visible tiles / sprites. See the values in it and try to change those and see how it moves Grid and Tilemaps. Basically it defines how Tile quads will "snap" to world positions. Tilemap's "grid" is defined by Grid object. Pretty much everything from 2014-> works just fine, with the exception of scene not familiar with Unity's approach to them" "show me to a resource that's at least current with the latest Unity."
But if you want to use colliders, add one to your tilemap and use raycasting, or one of the physics cast methods to detect if your step to direction will take you inside a collider or not. Many tile based games don't use colliders. This contradicts you wanting to create grid based movement a bit, you could already use an array of 1 and 0 to mark areas walkable. "I want this character to collide with tiles I specify in the tilemap." Google for "grid based movement" and you'll find many examples. It is a generic concept, not specific to unity. That is a matter of rounding your coordinates to certain tile size.
"I want to paint a specific tile on each Scene that the player spawns on, perfectly. Have you checked the 2D Roguelike tutorial? Although you'll have to do some work to find everything that is available. There is actually good amount of material, if you go through blog and videos. Is, surprisingly, not a lot of tutorial or guide material for lots of 2D concepts."
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