How Does Real-Time Collaborative Drawing Work in a Browser Tool?

Real-time collaborative drawing means two or more people draw on the same canvas at the same time and see each other's strokes appear immediately, without saving, sending, or refreshing anything. In a browser tool like Sora's FizzPaint, this works through a Live mode: you open the tool, switch to Live, and share the session link with others. No account is needed — the page states this directly. The catch is that "real-time" only covers what happens inside that shared session; anyone who isn't in it sees nothing.

What "real-time" actually means here

The tool's own description is the clearest definition available: "A collaborative drawing tool where everyone draws on the same canvas in real-time." Three things follow from that:

• One canvas, not copies. There is no per-person layer or private draft. Every stroke lands on the shared surface.
• Instant visibility. You see a change as it happens rather than after a sync step.
• Session-scoped. The shared state belongs to the live session, so joining is what grants you access to it.

This is different from the common "collaboration" pattern where each person edits their own copy and changes merge later. Here the merge is continuous.

How to start drawing together

1. Open the tool in your browser. The page loads with Solo and Live options plus an About panel — no sign-up wall appears in the page content.
2. Switch to Live mode. This is the collaborative state; Solo is the single-player state.
3. Share the session link with the people you want to draw with. They open it in their own browser.
4. Draw and watch. Each participant picks a brush and draws; strokes from everyone appear on the same canvas as they happen.

The expected result is a single canvas that multiple cursors and brushes are feeding at once. If you're the only one in Live mode, it behaves like a normal drawing surface — the difference only shows up when a second person joins.

Solo vs. Live: which to use

Use Solo when you want to experiment without anyone else's marks landing on your work — for example, dialing in a brush or checking how the line boil effect reads before committing to a shared drawing. Use Live when the point is the shared surface itself.

What to expect with several people drawing

Everyone draws with the same brush and FX set, and the line boil effect applies to the canvas as a whole rather than to one person's strokes. That has two practical consequences:

• Style collisions are visible. If one person draws clean lines and another uses a heavy boil, both appear on the same surface. Agree on a look first if you want a coherent result.
• The canvas gets busy fast. With multiple people drawing simultaneously, strokes overlap in ways you can't fully control. This is the nature of a shared surface, not a bug.

If you want to see how a boil effect behaves under that kind of traffic, a useful test is to have two people draw the same simple shape at the same time and compare how the lines interact.

Common snags

• "I'm drawing but nobody sees it." Check that you're in Live mode, not Solo. Solo work stays local to you.
• "The other person can't get in." They need the session link, not just the tool's address. Sharing the base URL puts them in their own session.
• "Strokes appear late or unevenly." Real-time delivery depends on each participant's connection. A slow link on one side shows up as delayed strokes for that person.
• Browser requirements. The tool runs in the browser, so a current browser and a stable connection are the baseline. The page content doesn't specify a supported-browser list, so if something fails to load, trying an up-to-date browser is the reasonable first move rather than a documented fix.

The short version

Real-time collaborative drawing in this tool is one shared canvas, one Live session, one link, and no account. Pick Solo to work alone, Live to work together, and expect the shared surface to reflect everyone's brushes and the canvas-wide line boil at once.