Particle universe guide
Keep your work
Everything is made in your browser, and nothing is uploaded. Every picture and video here is standard range (SDR); none is HDR.
| Button | What you get |
|---|---|
| Save PNG | The frame as you see it, as particles.png, on its dark ground. While Trail is above 0, the streaks are in the picture too. |
| Copy | The same picture as a PNG on the clipboard, where the browser allows it. |
| Record video | The moving frame, from the moment you press it until you press Stop recording, as particle-universe.mp4 (H.264). |
The PNG is the frame's size on your screen, times the screen's pixel density: up to 2 on a computer, and up to 1.5 on a phone. A bigger window makes a bigger PNG.
The page encodes the frames itself as it draws them, H.264 into an MP4 that opens anywhere. A browser that cannot encode H.264 (Firefox) gets a WebM instead, named by what it really wrote. See WebM and MediaRecorder.
The video runs at up to 30 frames a second, with no sound, and has no time limit. A short message says Recording when it starts and Video saved when it ends. Turn the cloud, push it, or pick a formation while it records; a cloud that does not move makes a still video.