Question How can I update the tiles, tilemaps, the palette and the viewport in Unity?

Unity Version: 2019.4.18f1

Image I am referring: https://ibb.co/album/XZkDZJ sorry that I can't directly insert image here, I don't why but the inserted image just show a crossed icon.

I want to update the tiles in Unity, for example, I have a "Player" sprite and tile which is a blue circle.

(image1)

Then, I want to replace it as a red square. I found that I can directly replace the image file in the folder. thenthe tilemap palette, the viewport also update the "Player" to become red square, which is good.


(image2)
(image3)

Then, I try the same method on tilemap. I import a tilemap, then directly put it into the palette, saving asset into "Tiles" folder.

(image6)

There are blue circle and red circle. Then, I replace the tilemap, the sprite of blue circle and red circle are replaced by a blue man and red man while keeping they have the same position on the tilemap.

(image8)

Then the tilemap, the tiles, the palette, even the map I created in the viewport also updated correctly, this is very good.

However, I find another issue if I want to do this with another approach.

First, I called the blue person sprite as "Player1", the red person sprite as "Player2".

(image9)

Next I rename the sprite, I make the green and red circle as the "Player1" and "Player2".

(image14)

However, the sprite has been updated, but the tiles, palette and the map I created in the viewport doesn't update.

(image15)

Then, the weirdest thing is if I rename the "Player1" and 2 to the original blue and red man sprite,

(image16)

The "Player 1" and "Player 2" will become the red and green circle!

(image17)

The sprite in tilemap and asset in tiles also show the "Player 1" and "Player2" are the blue and red man. but the palette and the map in viewport has been changed...and the green and red circle are deleted in the palette. I can recreate this situation every time and I wonder is this also an issue to others? I am curious is there a way to update the sprite inside Unity although at least I can replace the entire tilemap if I want to update the sprite.

 

When I changed the sprite name, Tile Asset is not updated, I have tried to manually update it - drag the sprite into the palette and replace the tile asset, but the map in viewport won't update.

 

okay, so this means I cannot change the sprite name to redirect the tile reference, and I need to change the reference sprite image itself so that the tile asset will also update correctly? Since I have two tilemaps as the below example, and I found that if I replace the whole tilemap - replace the entire left image by right image in the tilemap folder. And in Unity the two men are replaced by two circles.


So the above example is changing the sprite image through replacing the whole tilemap. But is there another way to change a specific sprite of a tilemap in Unity? For example, I have one tilemap and one extra texture inside Unity.

And I want to drag the blue circle into the palette to replace the blue man.
So I replace its tile assets.


but the blue man in the map does not update.


So this means the blue man in the map is still using the original sprite reference even the tile asset has changed? In this situation what should I do? Is it modifying the tilemap in drawing software and replace the entire tilemap would be the only option I can do for this case?