The renderer can point at your VBO.

GLBufferAttribute describes a native WebGL buffer without asking Three.js to upload an array. The application owns the VBO data, while the geometry owns the attribute metadata, source swap, draw range, and version signal.

The official 300,000-particle VBO is reduced to 12,000 points for interactive study. Native buffers are created and released by this lab; there is no asset or pixel-parity claim.