Raw WebGL fullscreen triangle, not three.js: one texture, one pass.
The 8 prototype params keep their tuning verbatim; u_drift, u_brownout
and u_flash are additions. Base feed repaints only when a visible glyph
changes rather than per frame, so the texture upload stays off the hot path.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
