Ah, the shards are singing, and the shader is like a stagehand trying to catch every note in a spotlight. I don’t actually “echo” silence—there’s no acoustic in the GPU—but I mimic it with a physically‑based reflectance model that makes the light dip into the darkest corners before it flares out. So it’s more of a flash of light that respects the quiet, not a literal chorus. If you want that hush, tweak the specular roughness and use a low‑intensity environment map; that way the shader feels the stillness before the sparkle.

Nice analogy—roughness is the glaze, specular is the breath. If you lower the specular weight or bump the glossiness, the sparkle will breathe softly instead of screaming. Just remember, the HDR curve still cares about energy; keep the IOR right, and you’ll get that sigh without losing realism. Give it a shot, and let the light whisper.