diff --git a/examples/js/postprocessing/AdaptiveToneMappingPass.js b/examples/js/postprocessing/AdaptiveToneMappingPass.js
index 3792ce2d980d0237ed960aff68e4c79a791ef370..b69d483917beceba0550d658c370bc350312b6bb 100644
--- a/examples/js/postprocessing/AdaptiveToneMappingPass.js
+++ b/examples/js/postprocessing/AdaptiveToneMappingPass.js
@@ -102,7 +102,7 @@ THREE.AdaptiveToneMappingPass = function ( adaptive, resolution ) {
 		uniforms: THREE.UniformsUtils.clone( this.adaptLuminanceShader.uniforms ),
 		vertexShader: this.adaptLuminanceShader.vertexShader,
 		fragmentShader: this.adaptLuminanceShader.fragmentShader,
-		defines: this.adaptLuminanceShader.defines,
+		defines: Object.assign( {}, this.adaptLuminanceShader.defines ),
 		blending: THREE.NoBlending
 	} );
 
diff --git a/examples/js/postprocessing/BokehPass.js b/examples/js/postprocessing/BokehPass.js
index 726864fb3294bd88172f70de3ab81f9a5fd0e01c..fb79ccb433bf8c5d9873075f8d6fff414e465037 100644
--- a/examples/js/postprocessing/BokehPass.js
+++ b/examples/js/postprocessing/BokehPass.js
@@ -57,7 +57,7 @@ THREE.BokehPass = function ( scene, camera, params ) {
 	bokehUniforms[ "farClip" ].value = camera.far;
 
 	this.materialBokeh = new THREE.ShaderMaterial( {
-		defines: bokehShader.defines,
+		defines: Object.assign( {}, bokehShader.defines ),
 		uniforms: bokehUniforms,
 		vertexShader: bokehShader.vertexShader,
 		fragmentShader: bokehShader.fragmentShader
diff --git a/examples/js/postprocessing/SAOPass.js b/examples/js/postprocessing/SAOPass.js
index a4355494e03aab9e3a12f5c36bbf58b074536db7..ae265545f19225ffa826a2b0eb3bf8399089ce79 100644
--- a/examples/js/postprocessing/SAOPass.js
+++ b/examples/js/postprocessing/SAOPass.js
@@ -99,7 +99,7 @@ THREE.SAOPass = function ( scene, camera, depthTexture, useNormals, resolution )
 
 	this.vBlurMaterial = new THREE.ShaderMaterial( {
 		uniforms: THREE.UniformsUtils.clone( THREE.DepthLimitedBlurShader.uniforms ),
-		defines: THREE.DepthLimitedBlurShader.defines,
+		defines: Object.assign( {}, THREE.DepthLimitedBlurShader.defines ),
 		vertexShader: THREE.DepthLimitedBlurShader.vertexShader,
 		fragmentShader: THREE.DepthLimitedBlurShader.fragmentShader
 	} );
@@ -112,7 +112,7 @@ THREE.SAOPass = function ( scene, camera, depthTexture, useNormals, resolution )
 
 	this.hBlurMaterial = new THREE.ShaderMaterial( {
 		uniforms: THREE.UniformsUtils.clone( THREE.DepthLimitedBlurShader.uniforms ),
-		defines: THREE.DepthLimitedBlurShader.defines,
+		defines: Object.assign( {}, THREE.DepthLimitedBlurShader.defines ),
 		vertexShader: THREE.DepthLimitedBlurShader.vertexShader,
 		fragmentShader: THREE.DepthLimitedBlurShader.fragmentShader
 	} );
diff --git a/examples/js/postprocessing/SMAAPass.js b/examples/js/postprocessing/SMAAPass.js
index 7085e6057ebc141ebb616fdb8622c4300f606601..29d7f05de71312b22e996b703f1b700da65f9a86 100644
--- a/examples/js/postprocessing/SMAAPass.js
+++ b/examples/js/postprocessing/SMAAPass.js
@@ -63,7 +63,7 @@ THREE.SMAAPass = function ( width, height ) {
 	this.uniformsEdges[ "resolution" ].value.set( 1 / width, 1 / height );
 
 	this.materialEdges = new THREE.ShaderMaterial( {
-		defines: THREE.SMAAShader[0].defines,
+		defines: Object.assign( {}, THREE.SMAAShader[ 0 ].defines ),
 		uniforms: this.uniformsEdges,
 		vertexShader: THREE.SMAAShader[0].vertexShader,
 		fragmentShader: THREE.SMAAShader[0].fragmentShader
@@ -79,7 +79,7 @@ THREE.SMAAPass = function ( width, height ) {
 	this.uniformsWeights[ "tSearch" ].value = this.searchTexture;
 
 	this.materialWeights = new THREE.ShaderMaterial( {
-		defines: THREE.SMAAShader[1].defines,
+		defines: Object.assign( {}, THREE.SMAAShader[ 1 ].defines ),
 		uniforms: this.uniformsWeights,
 		vertexShader: THREE.SMAAShader[1].vertexShader,
 		fragmentShader: THREE.SMAAShader[1].fragmentShader
diff --git a/examples/js/postprocessing/ShaderPass.js b/examples/js/postprocessing/ShaderPass.js
index d42d20692a992fc96075f34fc5dac385cfbaa0da..b244a0fa5b439dcb11703debb4912ac3bf4736c7 100644
--- a/examples/js/postprocessing/ShaderPass.js
+++ b/examples/js/postprocessing/ShaderPass.js
@@ -20,7 +20,7 @@ THREE.ShaderPass = function ( shader, textureID ) {
 
 		this.material = new THREE.ShaderMaterial( {
 
-			defines: shader.defines || {},
+			defines: Object.assign( {}, shader.defines ),
 			uniforms: this.uniforms,
 			vertexShader: shader.vertexShader,
 			fragmentShader: shader.fragmentShader