Its been a very long time since ive messed with hexkit. I believe i had difficulty as well finding the correct x and y for the tiles. This can be solved with a little trial and error, but i also had difficulty exporting images because hexkit would blur the perfect pixels. You might have more success with the program "Tiled" and its free.
A member registered Dec 04, 2020 · View creator page →
Creator of
Tiles for building custom space maps.
Real Dangerous Plants and Fungi for your game
Prehistoric Beasts for your Campaign
Various Mausritter compatible supplements