Add existing to tracked

node_modules/@cesium/engine/Source/Shaders/CompareAndPackTranslucentDepth.glsl

@@ -0,0 +1,12 @@
+uniform sampler2D u_opaqueDepthTexture;
+uniform sampler2D u_translucentDepthTexture;
+
+in vec2 v_textureCoordinates;
+
+void main()
+{
+    float opaqueDepth = texture(u_opaqueDepthTexture, v_textureCoordinates).r;
+    float translucentDepth = texture(u_translucentDepthTexture, v_textureCoordinates).r;
+    translucentDepth = czm_branchFreeTernary(translucentDepth > opaqueDepth, 1.0, translucentDepth);
+    out_FragColor = czm_packDepth(translucentDepth);
+}