diff --git a/src/renderers/webgl/WebGLBindingStates.js b/src/renderers/webgl/WebGLBindingStates.js
index d63aeb7f35281a..06d1a07612bd43 100644
--- a/src/renderers/webgl/WebGLBindingStates.js
+++ b/src/renderers/webgl/WebGLBindingStates.js
@@ -4,7 +4,7 @@ function WebGLBindingStates( gl, attributes ) {
 
 	const maxVertexAttributes = gl.getParameter( gl.MAX_VERTEX_ATTRIBS );
 
-	const bindingStates = {};
+	const bindingStates = new Map();
 
 	const defaultState = createBindingState( null );
 	let currentState = defaultState;
@@ -71,30 +71,30 @@ function WebGLBindingStates( gl, attributes ) {
 
 		const wireframe = ( material.wireframe === true );
 
-		let programMap = bindingStates[ geometry.id ];
+		let programMap = bindingStates.get( geometry.id );
 
 		if ( programMap === undefined ) {
 
-			programMap = {};
-			bindingStates[ geometry.id ] = programMap;
+			programMap = new Map();
+			bindingStates.set( geometry.id, programMap );
 
 		}
 
-		let stateMap = programMap[ program.id ];
+		let stateMap = programMap.get( program.id );
 
 		if ( stateMap === undefined ) {
 
-			stateMap = {};
-			programMap[ program.id ] = stateMap;
+			stateMap = new Map();
+			programMap.set( program.id, stateMap );
 
 		}
 
-		let state = stateMap[ wireframe ];
+		let state = stateMap.get( wireframe );
 
 		if ( state === undefined ) {
 
 			state = createBindingState( createVertexArrayObject() );
-			stateMap[ wireframe ] = state;
+			stateMap.set( wireframe, state );
 
 		}
 
@@ -475,77 +475,59 @@ function WebGLBindingStates( gl, attributes ) {
 
 		reset();
 
-		for ( const geometryId in bindingStates ) {
+		for ( const programMap of bindingStates.values() ) {
 
-			const programMap = bindingStates[ geometryId ];
+			for ( const stateMap of programMap.values() ) {
 
-			for ( const programId in programMap ) {
+				for ( const state of stateMap.values() ) {
 
-				const stateMap = programMap[ programId ];
-
-				for ( const wireframe in stateMap ) {
-
-					deleteVertexArrayObject( stateMap[ wireframe ].object );
-
-					delete stateMap[ wireframe ];
+					deleteVertexArrayObject( state.object );
 
 				}
 
-				delete programMap[ programId ];
-
 			}
 
-			delete bindingStates[ geometryId ];
-
 		}
 
+		bindingStates.clear();
+
 	}
 
 	function releaseStatesOfGeometry( geometry ) {
 
-		if ( bindingStates[ geometry.id ] === undefined ) return;
+		if ( bindingStates.get( geometry.id ) === undefined ) return;
 
-		const programMap = bindingStates[ geometry.id ];
+		const programMap = bindingStates.get( geometry.id );
 
-		for ( const programId in programMap ) {
+		for ( const stateMap of programMap.values() ) {
 
-			const stateMap = programMap[ programId ];
+			for ( const state of stateMap.values() ) {
 
-			for ( const wireframe in stateMap ) {
-
-				deleteVertexArrayObject( stateMap[ wireframe ].object );
-
-				delete stateMap[ wireframe ];
+				deleteVertexArrayObject( state.object );
 
 			}
 
-			delete programMap[ programId ];
-
 		}
 
-		delete bindingStates[ geometry.id ];
+		bindingStates.delete( geometry.id );
 
 	}
 
 	function releaseStatesOfProgram( program ) {
 
-		for ( const geometryId in bindingStates ) {
-
-			const programMap = bindingStates[ geometryId ];
-
-			if ( programMap[ program.id ] === undefined ) continue;
+		for ( const programMap of bindingStates.values() ) {
 
-			const stateMap = programMap[ program.id ];
+			if ( programMap.get( program.id ) === undefined ) continue;
 
-			for ( const wireframe in stateMap ) {
+			const stateMap = programMap.get( program.id );
 
-				deleteVertexArrayObject( stateMap[ wireframe ].object );
+			for ( const state of stateMap.values() ) {
 
-				delete stateMap[ wireframe ];
+				deleteVertexArrayObject( state.object );
 
 			}
 
-			delete programMap[ program.id ];
+			programMap.delete( program.id );
 
 		}
 
diff --git a/src/renderers/webgl/WebGLProperties.js b/src/renderers/webgl/WebGLProperties.js
index 09a495447525f0..03516c92a27415 100644
--- a/src/renderers/webgl/WebGLProperties.js
+++ b/src/renderers/webgl/WebGLProperties.js
@@ -14,7 +14,24 @@ function WebGLProperties() {
 
 		if ( map === undefined ) {
 
-			map = {};
+			if ( object.isMaterial ) {
+
+				map = createMaterialProperties();
+
+			} else if ( object.isTexture ) {
+
+				map = createTextureProperties();
+
+			} else if ( object.isWebGLRenderTarget ) {
+
+				map = createRenderTargetProperties();
+
+			} else {
+
+				map = {};
+
+			}
+
 			properties.set( object, map );
 
 		}
@@ -23,6 +40,74 @@ function WebGLProperties() {
 
 	}
 
+	function createMaterialProperties() {
+
+		return {
+			outputColorSpace: undefined,
+			batching: undefined,
+			batchingColor: undefined,
+			instancing: undefined,
+			instancingColor: undefined,
+			instancingMorph: undefined,
+			skinning: undefined,
+			morphTargets: undefined,
+			morphNormals: undefined,
+			morphColors: undefined,
+			morphTargetsCount: undefined,
+			numClippingPlanes: undefined,
+			numIntersection: undefined,
+			vertexAlphas: undefined,
+			vertexTangents: undefined,
+			toneMapping: undefined,
+			fog: undefined,
+			environment: undefined,
+			envMap: undefined,
+			envMapRotation: undefined,
+			programs: undefined,
+			currentProgram: undefined,
+			uniforms: undefined,
+			uniformsList: undefined,
+			needsLights: undefined,
+			lightsStateVersion: undefined,
+			receiveShadow: undefined,
+			light: undefined,
+			clippingState: undefined,
+			__version: undefined
+		};
+
+	}
+
+	function createTextureProperties() {
+
+		return {
+			__init: undefined,
+			__webglTexture: undefined,
+			__cacheKey: undefined,
+			__version: undefined,
+			__currentAnisotropy: undefined,
+			__renderTarget: undefined
+		};
+
+	}
+
+	function createRenderTargetProperties() {
+
+		return {
+			__webglFramebuffer: undefined,
+			__webglDepthbuffer: undefined,
+			__webglMultisampledFramebuffer: undefined,
+			__webglColorRenderbuffer: undefined,
+			__webglDepthRenderbuffer: undefined,
+			__hasExternalTextures: undefined,
+			__boundDepthTexture: undefined,
+			__depthDisposeCallback: undefined,
+			__autoAllocateDepthBuffer: undefined,
+			__useRenderToTexture: undefined,
+			__useDefaultFramebuffer: undefined
+		};
+
+	}
+
 	function remove( object ) {
 
 		properties.delete( object );
diff --git a/src/renderers/webgl/WebGLShadowMap.js b/src/renderers/webgl/WebGLShadowMap.js
index e38833a78f851b..56d70e25cca6d0 100644
--- a/src/renderers/webgl/WebGLShadowMap.js
+++ b/src/renderers/webgl/WebGLShadowMap.js
@@ -29,7 +29,7 @@ function WebGLShadowMap( renderer, objects, capabilities ) {
 		_depthMaterialVSM = new MeshDepthMaterial( { depthPacking: IdentityDepthPacking } ),
 		_distanceMaterial = new MeshDistanceMaterial(),
 
-		_materialCache = {},
+		_materialCache = new Map(),
 
 		_maxTextureSize = capabilities.maxTextureSize;
 
@@ -392,21 +392,21 @@ function WebGLShadowMap( renderer, objects, capabilities ) {
 
 				const keyA = result.uuid, keyB = material.uuid;
 
-				let materialsForVariant = _materialCache[ keyA ];
+				let materialsForVariant = _materialCache.get( keyA );
 
 				if ( materialsForVariant === undefined ) {
 
-					materialsForVariant = {};
-					_materialCache[ keyA ] = materialsForVariant;
+					materialsForVariant = new Map();
+					_materialCache.set( keyA, materialsForVariant );
 
 				}
 
-				let cachedMaterial = materialsForVariant[ keyB ];
+				let cachedMaterial = materialsForVariant.get( keyB );
 
 				if ( cachedMaterial === undefined ) {
 
 					cachedMaterial = result.clone();
-					materialsForVariant[ keyB ] = cachedMaterial;
+					materialsForVariant.set( keyB, cachedMaterial );
 					material.addEventListener( 'dispose', onMaterialDispose );
 
 				}
@@ -528,17 +528,15 @@ function WebGLShadowMap( renderer, objects, capabilities ) {
 
 		// make sure to remove the unique distance/depth materials used for shadow map rendering
 
-		for ( const id in _materialCache ) {
-
-			const cache = _materialCache[ id ];
+		for ( const cache of _materialCache.values() ) {
 
 			const uuid = event.target.uuid;
 
-			if ( uuid in cache ) {
+			if ( cache.has( uuid ) ) {
 
-				const shadowMaterial = cache[ uuid ];
+				const shadowMaterial = cache.get( uuid );
 				shadowMaterial.dispose();
-				delete cache[ uuid ];
+				cache.delete( uuid );
 
 			}
 
diff --git a/src/renderers/webgl/WebGLTextures.js b/src/renderers/webgl/WebGLTextures.js
index 8194e20243d584..e95447811ff6b2 100644
--- a/src/renderers/webgl/WebGLTextures.js
+++ b/src/renderers/webgl/WebGLTextures.js
@@ -1776,8 +1776,8 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 
 				const disposeEvent = () => {
 
-					delete renderTargetProperties.__boundDepthTexture;
-					delete renderTargetProperties.__depthDisposeCallback;
+					renderTargetProperties.__boundDepthTexture = undefined;
+					renderTargetProperties.__depthDisposeCallback = undefined;
 					depthTexture.removeEventListener( 'dispose', disposeEvent );
 
 				};