I’ve had a C64 game in development for a while, along with several other game/demo projects, and I’ve required robust image conversion and editing for those. To date, the best image converter I could find is RetroPixels, and none of the editors quite suited my needs. The problem I found with all of them is that they feel like in-house one-offs, with just enough implemented to get someone’s job done, but not polished and not tested, with lots of crashing, etc.

Bolting on filters and plugins for larger image editors is not a great path either, in my opinion. I wanted something built out as a fully polished app, with the Commodore 64 pallet and restrictions at its core, not an afterthought.

So I present to you Mosaicus. MIT license; a Rust app for Windows, MacOS, and Linux. Download and more details at the link. Below I will post a summary of the technical features, but it’s fully documented with an extensive help file here.

I welcome feedback, especially if you a C64 artist and you are missing something in Mosaicus that you’d like to have. I am open to adding more editing features if there is interest.