This GPGPU Particle System is using GL_DRAW_BUFFER extension.
It means it's not running everywhere. Only desktop browsers support it for now.
However it can handle quite large files like bodyscans and highpoly meshes.
More info: BLOG POST
Demo video: YOUTUBE
Max number of points (min 10.000, max 2.000.000), depending the object you upload
Warning: large numbers can be heavy for low cost GPUs.
TIP 1: Upload any OBJ, PLY or JSON 3D files (download samples here)
TIP 2: Tessellate your mesh if it's not highpoly enough.
TIP 3: Use space bar to freeze/unfreeze time ;)
Left Click & Drag: ROTATE
Right Click & Drag: PAN
Mouse Wheel: ZOOM
Space bar: FREEZE