How to create tilemap in Unity2D
1. Select GameObject > 2D Object > Tilemap in unity menu. 2. GameObject "Grid" and "Tilemap" will be created as below 3. Select Window > 2D > Tile Palette in menu 4. Select "Create New Select" as below screen shot and then create new palette 5. Select folder to store palette file 6. Register tile image as below 7. In Tile Palette window, select tile brush and "Paint a filled box with active brush" tool (center icon) in tool bar 8. Go to the Scene window. You can see grid as below 9. Drag tile on the grid of Scene window to create tile map