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web-app/node_modules/three/examples/jsm/tsl/display/BleachBypass.js

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+import { float, Fn, vec3, vec4, min, max, mix, luminance } from 'three/tsl';
+
+export const bleach = /*@__PURE__*/ Fn( ( [ color, opacity = 1 ] ) => {
+
+	const base = color;
+	const lum = luminance( base.rgb );
+	const blend = vec3( lum );
+
+	const L = min( 1.0, max( 0.0, float( 10.0 ).mul( lum.sub( 0.45 ) ) ) );
+
+	const result1 = blend.mul( base.rgb ).mul( 2.0 );
+	const result2 = float( 2.0 ).mul( blend.oneMinus() ).mul( base.rgb.oneMinus() ).oneMinus();
+
+	const newColor = mix( result1, result2, L );
+
+	const A2 = base.a.mul( opacity );
+
+	const mixRGB = A2.mul( newColor.rgb );
+
+	mixRGB.addAssign( base.rgb.mul( A2.oneMinus() ) );
+
+	return vec4( mixRGB, base.a );
+
+} );