I think this may be related to flipped tiles, but I have noticed now and then that while drawing on a tile, my drawing is incorrectly “mirrored” within the same tile. In other words, too many pixels in a tile are changed when drawing … maybe a bug with trying to auto-update tiles throughout the document
Example
dacap
August 29, 2025, 12:00pm
2
Thanks for reporting this bug @dogboydog , I’ve created a new issue in GitHub:
opened 11:59AM - 29 Aug 25 UTC
bug
high priority
sprite editor
tilemap
Reported here: https://community.aseprite.org/t/bug-with-drawing-on-tiles/27126
…
In Manual mode when we paint in the flipped version of the tile it doesn't paint pixels correctly, example file: [flipped-tiles.zip](https://github.com/user-attachments/files/22044790/flipped-tiles.zip)

I'm pretty sure that this was working originally, so I'm trying to find the regression (or probably it never worked?).
I’ll check when this bug was introduced, but I think it was working in some moment.
1 Like
dacap
August 29, 2025, 9:14pm
3
I think this bug only happens when “Pixel Perfect” mode is checked.
That’s interesting. I definitely always use that option