fix(visualizer): restore caustic lighting

web/src/blob/blob.ts

@@ -45,8 +45,8 @@ const SLOW_FOR = 2; // … and this many seconds of them step the quality down
 const FAST_FOR = 10; // s of frames on time before it tries one step up again
 /// Quality steps: icosphere subdivisions and resolution scale.
 const QUALITY: [number, number][] = [[5, 1], [4, 1], [4, 0.6], [3, 0.5]];
-/// Quality steps that still draw the light behind the drop.
-const CAUSTICS_UP_TO = 1;
+/// Keep the light at reduced resolution; only the emergency tier omits it.
+const CAUSTICS_UP_TO = 2;
 const CAUSTICS_IN = 0.6; // s for the light to come up as playing starts, and go
 
 /// Ferrofluid spikes: "auto" shows them where the track's look asks for them (style.ts).

web/src/blob/caustics.ts

@@ -141,7 +141,7 @@ export class Caustics {
     gl.uniform1f(u.uHue, look.hue);
     gl.uniform1f(u.uIri, look.iri);
     gl.uniform1f(u.uHeat, look.heat);
-    gl.uniform1f(u.uAmount, c.amount * look.caustics * 0.65);
+    gl.uniform1f(u.uAmount, c.amount * look.caustics);
     gl.disable(gl.DEPTH_TEST);
     gl.depthMask(false);
     gl.bindVertexArray(this.vao);