How to create a new sprite asset from a Tile Palette? [Beginner Question]

Hi Unity folks!

Super beginner here following a tutorial where I am essentially trying to create a 2D corner sprite for my platformer game. I have a normal platform asset that I found from itch.io below (Screenshot #1):


Within the Tile Palette, I was able to rotate the normal platform asset to be facing left and right:
See screenshot #2 attached above.
Now I’m trying to add the above, rotated sprite (left and right sprite) to my Tiling rule but I can’t. I have to drag an actual sprite asset into the Sprite for the Tiling Rules.

Essentially I want to create a new sprite asset so I can use it within the Tiling Rules, so that I have some sort of corner sprite instead of what I have now:
See screenshot #3 and #4 above

Additional question:

  • Unity doesn’t seem that great in editing sprites? Or am I mistaken and just a super noob. What’s the best way to edit/redraw the normal standard platform sprite above and create a corner sprite?

Thanks for reading through this post y’all. Please let me know if I should be posting elsewhere or something :grinning: