<!-- SOLIDIVISM · part 476 -->
ace = 0;
		let _currentActiveMipmapLevel = 0;
		let _currentRenderTarget = null;
		let _currentMaterialId = -1;

		let _currentCamera = null;

		const _currentViewport = new Vector4();
		const _currentScissor = new Vector4();
		let _currentScissorTest = null;

		const _currentClearColor = new Color( 0x000000 );
		let _currentClearAlpha = 0;

		//

		let _width = canvas.width;
		let _height = canvas.height;

		let _pixelRatio = 1;
		let _opaqueSort = null;
		let _transparentSort = null;

		const _viewport = new Vector4( 0, 0, _width, _height );
		const _scissor = new Vector4( 0, 0, _width, _height );
		let _scissorTest = false;

		// frustum

		const _frustum = new Frustum();

		// clipping

		let _clippingEnabled = false;
		let _localClippingEnabled = false;

		// camera matrices cache

		const _projScreenMatrix = new Matrix4();

		const _vector3 = new Vector3();

		const _vector4 = new Vector4();

		const _emptyScene = { background: null, fog: null, environment: null, overrideMaterial: null, isScene: true };

		let _renderBackground = false;

		function getTargetPixelRatio() {

			return _currentRenderTarget === null ? _pixelRatio : 1;

		}

		// initialize

		let _gl = context;

		function getContext( contextName, contextAttributes ) {

			return canvas.getContext( contextName, contextAttributes );

		}

		let extensions, capabilities, state, info;
		let properties, textures, environments, attributes, geometries, objects;
		let programCache, materials, renderLists, renderStates, clipping, shadowMap;

		let background, morphtargets, bufferRenderer, indexedBufferRenderer;

		let utils, bindingStates, uniformsGroups;

		try {

			const contextAttributes = {
				alpha: true,
				depth,
				stencil,
				antialias,
				premultipliedAlpha,
				preserveDrawingBuffer,
				powerPreference,
				failIfMajorPerformanceCaveat,
			};

			// OffscreenCanvas does not have setAttribute, see #22811
			if ( 'setAttribute' in canvas ) canvas.setAttribute( 'data-engine', `three.js r${REVISION}` );

			// event listeners must be registered before WebGL context is created, see #12753
			canvas.addEventListener( 'webglcontextlost', onContextLost, false );
			canvas.addEventListener( 'webglcontextrestored', onContextRestore, false );
			canvas.addEventListener( 'webglcontextcreationerror', onContextCreationError, false );

			if ( _gl === null ) {

				const contextName = 'webgl2';

				_gl = getContext( contextName, contextAttributes );

				if ( _gl === null ) {

					if ( getContext( contextName ) ) {

						throw new Error( 'THREE.WebGLRenderer: Error creating WebGL context with your selected attributes.' );

					} else {

						throw new Error( 'THREE.WebGLRenderer: Error creating WebGL context.' );

					}

				}

			}

			initGLContext();

		} catch ( e ) {

			canvas.removeEventListener( 'webglcontextlost', onContextLost, false );
			canvas.removeEventListener( 'webglcontextrestored', onContextRestore, false );
			canvas.removeEventListener( 'webglcontextcreationerror', onContextCreationError, false );

			error( 'WebGLRenderer: ' + e.message );
			throw e;

		}

		function initGLContext() {

			extensions = new WebGLExtensions( _gl );
			extensions.init();

			utils = new WebGLUtils( _gl, extensions );

			capabilities = new WebGLCapabilities( _gl, extensions, parameters, utils );

			state = new WebGLState( _gl, extensions );

			if ( capabilities.reversedDepthBuffer && reversedDepthBuffer ) {

				state.buffers.depth.setReversed( true );

			}

			_scratchFramebuffer = _gl.createFramebuffer();
			_srcFramebuffer = _gl.createFramebuffer();
			_dstFramebuffer = _gl.createFramebuffer();

			info = new WebGLInfo( _gl );
			properties = new WebGLProperties();
			textures = new WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info );
			environments = new WebGLEnvironments( _this );
			attributes = new WebGLAttributes( _gl );
			bindingStates = new WebGLBindingStates( _gl, attributes );
			geometries = new WebGLGeometries( _gl, attributes, info, bindingStates );
			objects = new WebGLObjects( _gl, geometries, attributes, bindingStates, info );
			morphtargets = new WebGLMorphtargets( _gl, capabilities, textures );
			clipping = new WebGLClipping( properties );
			programCache = new WebGLPrograms( _this, environments, extensions, capabilities, bindingStates, clipping );
			materials = new WebGLMaterials( _this, properties );
			renderLists = new WebGLRenderLists();
			renderStates = new WebGLRenderStates( extensions );
			background = new WebGLBackground( _this, environments, state, objects, _alpha, premultipliedAlpha );
			shadowMap = new WebGLShadowMap( _this, objects, capabilities );
			uniformsGroups = new WebGLUniformsGroups( _gl, info, capabilities, state );

			bufferRenderer = new WebGLBufferRenderer( _gl, extensions, info );
			indexedBufferRenderer = new WebGLIndexedBufferRenderer( _gl, extensions, info );

			info.programs = programCache.programs;

			/**