What is the workflow for reimporting tiles?

Hi!
I'm curious what your workflow is when you are still working on your tileset, but you use it already to build your tilemaps.

Here is how I tried it and failed:

1. Created a tileset image with an image editing software, saved to png, I imported it as a sprite in unity.
2. Created a new palette.
3. Assigned the sliced sprites to the palette, so unity generates Tile objects from it.
4. I built a level using this palette.
5. Then I wanted to change smaller bits of the original tileset image.
   
6. I changed the tileset image, and saved it on top of the original file.
7. I grabbed the updated sliced sprites and assigned them to the palette, so unity generated new Tile objects from it, overriding the previous Tile objects.
8. The whole tilemap I made previously was now filled in with different shades of red / pink instead of the new tiles.

So the question is, how can I properly reimport a tileset image and update the tiles in the tilemap with the new ones.

Thanks for your answers in advance!

 

If the layout of the tiles are exactly the same, then in your file browser outside of Unity, you can replace the image with a new one, making sure it has exactly the same file name. That will swap the texture out and keep all the metadata and asset references.