https://github.com/WWBN/AVideo/issues/8713

node_modules/three/examples/js/shaders/UnpackDepthRGBAShader.js

@@ -0,0 +1,47 @@
+/**
+ * Unpack RGBA depth shader
+ * - show RGBA encoded depth as monochrome color
+ */
+
+THREE.UnpackDepthRGBAShader = {
+
+	uniforms: {
+
+		'tDiffuse': { value: null },
+		'opacity': { value: 1.0 }
+
+	},
+
+	vertexShader: [
+
+		'varying vec2 vUv;',
+
+		'void main() {',
+
+		'	vUv = uv;',
+		'	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
+
+		'}'
+
+	].join( '\n' ),
+
+	fragmentShader: [
+
+		'uniform float opacity;',
+
+		'uniform sampler2D tDiffuse;',
+
+		'varying vec2 vUv;',
+
+		'#include <packing>',
+
+		'void main() {',
+
+		'	float depth = 1.0 - unpackRGBAToDepth( texture2D( tDiffuse, vUv ) );',
+		'	gl_FragColor = vec4( vec3( depth ), opacity );',
+
+		'}'
+
+	].join( '\n' )
+
+};