MOSS is a drawing toy where each brush is a tiny script that knows about every pixel on the canvas. You define how it paints with noise, randomness, patterns, stroke speed, pressure, and every touch executes the code.
So you can have a brush that scatters pixels like a real spray can or one that stamps shapes that mutate as you drag. Or perspective lines that actually converge. Or a fill bucket with smart gap awareness (I called it "Fill of my Dreams" and added to the brush list).
Happy to share brush code in the comments or explore ideas together. There's a (?) in the bottom right toolbar with API docs, and a prompt copy at the bottom if you wanted to work with the API through an agent.
Could you add support for holding `Shift` to keep your line straight while painting, ala MSPaint?
I think what could be really interesting is some procedural generation brushes... Like a brush that generates a random city-scape as you draw it. That sounds so exciting..
Maybe using wave function collapse:
It feels _amazing_ to draw a bird in a single stroke!
Maybe this can give you some inspiration!
MOSS is a pixel editor with brushes that feel alive. Paint with tools that blend, spread, drip, grow, and glitch — each one behaving differently and each one completely customizable.
Every cell of the MOSS canvas is a little piece of data that can be manipulated by a brush. Colors accumulate, patterns emerge, and happy accidents turn into your favorite pieces. It's the kind of toy where you sit down for five minutes and look up an hour later.
MOSS comes with 50+ brushes ready to go, from simple paint and ink to wild things like vine growth, wet drips, and generative plaid. Don't like how one works? Tweak it! Every brush is programmable — change how it spreads, what it leaves behind, how it reacts to color.
When you're done, save your work and share it with a friend. Anyone can open your image in MOSS to play with the same brushes and palette.