Could have been handy a while later but I never managed to find this post again... It was an open source program hosted on Github FWIW.
https://news.ycombinator.com/item?id=23157408
You can also do it with Photopea albeit it's s bit harder
Could have been handy a while later but I never managed to find this post again... It was an open source program hosted on Github FWIW.