<!-- NEW2 — TEST 2 · THE DISTRICT OF 800 · part 393 -->
	function onTextureDispose( event ) {

		const texture = event.target;

		texture.removeEventListener( 'dispose', onTextureDispose );

		deallocateTexture( texture );

		if ( texture.isVideoTexture ) {

			_videoTextures.delete( texture );

		}

		if ( texture.isHTMLTexture ) {

			_htmlTextures.delete( texture );

		}

	}

	function onRenderTargetDispose( event ) {

		const renderTarget = event.target;

		renderTarget.removeEventListener( 'dispose', onRenderTargetDispose );

		deallocateRenderTarget( renderTarget );

	}

	//

	function deallocateTexture( texture ) {

		const textureProperties = properties.get( texture );

		if ( textureProperties.__webglInit === undefined ) return;

		// check if it's necessary to remove the WebGLTexture object

		const source = texture.source;
		const webglTextures = _sources.get( source );

		if ( webglTextures ) {

			const webglTexture = webglTextures[ textureProperties.__cacheKey ];
			webglTexture.usedTimes --;

			// the WebGLTexture object is not used anymore, remove it

			if ( webglTexture.usedTimes === 0 ) {

				deleteTexture( texture );

			}

			// remove the weak map entry if no WebGLTexture uses the source anymore

			if ( Object.keys( webglTextures ).length === 0 ) {

				_sources.delete( source );

			}

		}

		properties.remove( texture );

	}

	function deleteTexture( texture ) {

		const textureProperties = properties.get( texture );
		_gl.deleteTexture( textureProperties.__webglTexture );

		const source = texture.source;
		const webglTextures = _sources.get( source );
		delete webglTextures[ textureProperties.__cacheKey ];

		info.memory.textures --;

	}

	function deallocateRenderTarget( renderTarget ) {

		const renderTargetProperties = properties.get( renderTarget );

		if ( renderTarget.depthTexture ) {

			renderTarget.depthTexture.dispose();

			properties.remove( renderTarget.depthTexture );

		}

		if ( renderTarget.isWebGLCubeRenderTarget ) {

			for ( let i = 0; i < 6; i ++ ) {

				if ( Array.isArray( renderTargetProperties.__webglFramebuffer[ i ] ) ) {

					for ( let level = 0; level < renderTargetProperties.__webglFramebuffer[ i ].length; level ++ ) _gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ][ level ] );

				} else {

					_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ] );

				}

				if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer[ i ] );

			}

		} else {

			if ( Array.isArray( renderTargetProperties.__webglFramebuffer ) ) {

				for ( let level = 0; level < renderTargetProperties.__webglFramebuffer.length; level ++ ) _gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ level ] );

			} else {

				_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer );

			}

			if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer );
			if ( renderTargetProperties.__webglMultisampledFramebuffer ) _gl.deleteFramebuffer( renderTargetProperties.__webglMultisampledFramebuffer );

			if ( renderTargetProperties.__webglColorRenderbuffer ) {

				for ( let i = 0; i < renderTargetProperties.__webglColorRenderbuffer.length; i ++ ) {

					if ( renderTargetProperties.__webglColorRenderbuffer[ i ] ) _gl.deleteRenderbuffer( renderTargetProperties.__webglColorRenderbuffer[ i ] );

				}

			}

			if ( renderTargetProperties.__webglDepthRenderbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthRenderbuffer );

		}

		const textures = renderTarget.textures;

		for ( let i = 0, il = textures.length; i < il; i ++ ) {

			const attachmentProperties = properties.get( textures[ i ] );

			if ( attachmentProperties.__webglTexture ) {

				_gl.deleteTexture( attachmentProperties.__webglTexture );

				info.memory.textures --;

			}

			properties.remove( textures[ i ] );

		}

		properties.remove( renderTarget );

	}

	//

	let textureUnits = 0;

	function resetTextureUnits() {

		textureUnits = 0;

	}

	function getTextureUnits() {

		return textureUnits;

	}

	function setTextureUnits( value ) {

		textureUnits = value;

	}

	function allocateTextureUnit() {

		const textureUnit = textureUnits;

		if ( textureUnit >= capabilities.maxTextures ) {

			warn( 'WebGLTextures: Trying to use ' + ( textureUnit + 1 ) + ' texture units while this GPU supports only ' + capabilities.maxTextures );

		}

		textureUnits += 1;

		return textureUnit;

	}

	function getTextureCacheKey( texture ) {

		const array = [];

		array.push( texture.wrapS );
		array.push( texture.wrapT );
		array.push( texture.wrapR || 0 );
		array.push( texture.magFilter );
		array.push( texture.minFilter );
		array.push( texture.anisotropy );
		array.push( texture.internalFormat );
		array.push( texture.format );
		array.push( texture.type );
		array.push( texture.generateMipmaps );
		array.push( texture.premultiplyAlpha );
		array.push(