diff --git a/build/three.js b/build/three.js
index 62be131e0604e932e434a2f189325955a8b2f36f..e32a638e7bf0e6f797f229fcf1de6402d29380a4 100644
--- a/build/three.js
+++ b/build/three.js
@@ -5796,7 +5796,7 @@
 
 	var distanceRGBA_vert = "#define DISTANCE\nvarying vec3 vWorldPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\tvWorldPosition = worldPosition.xyz;\n}\n";
 
-	var equirect_frag = "uniform sampler2D tEquirect;\nuniform float tFlip;\nvarying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldPosition );\n\tvec2 sampleUV;\n\tsampleUV.y = saturate( tFlip * direction.y * -0.5 + 0.5 );\n\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\n}\n";
+	var equirect_frag = "uniform sampler2D tEquirect;\nvarying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldPosition );\n\tvec2 sampleUV;\n\tsampleUV.y = asin( clamp( direction.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\n}\n";
 
 	var equirect_vert = "varying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvWorldPosition = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}\n";
 
@@ -6113,15 +6113,10 @@
 
 		},
 
-		/* -------------------------------------------------------------------------
-		//	Cube map shader
-		 ------------------------------------------------------------------------- */
-
 		equirect: {
 
 			uniforms: {
 				tEquirect: { value: null },
-				tFlip: { value: - 1 }
 			},
 
 			vertexShader: ShaderChunk.equirect_vert,
diff --git a/build/three.min.js b/build/three.min.js
index 6affd87c2b2b0abc6e5d28c2a819858f9e5a78ca..9be9a4a2739d9d64c4c2d98c6c68aaf67b0e3fe4 100644
--- a/build/three.min.js
+++ b/build/three.min.js
@@ -414,7 +414,7 @@ cube_vert:"varying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvWo
 depth_vert:"#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n}\n",
 distanceRGBA_frag:"#define DISTANCE\nuniform vec3 referencePosition;\nuniform float nearDistance;\nuniform float farDistance;\nvarying vec3 vWorldPosition;\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main () {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\tfloat dist = length( vWorldPosition - referencePosition );\n\tdist = ( dist - nearDistance ) / ( farDistance - nearDistance );\n\tdist = saturate( dist );\n\tgl_FragColor = packDepthToRGBA( dist );\n}\n",
 distanceRGBA_vert:"#define DISTANCE\nvarying vec3 vWorldPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\tvWorldPosition = worldPosition.xyz;\n}\n",
-equirect_frag:"uniform sampler2D tEquirect;\nuniform float tFlip;\nvarying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldPosition );\n\tvec2 sampleUV;\n\tsampleUV.y = saturate( tFlip * direction.y * -0.5 + 0.5 );\n\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\n}\n",equirect_vert:"varying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvWorldPosition = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}\n",
+equirect_frag:"uniform sampler2D tEquirect;\nvarying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldPosition );\n\tvec2 sampleUV;\n\tsampleUV.y = asin( clamp( direction.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\n}\n",equirect_vert:"varying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvWorldPosition = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}\n",
 linedashed_frag:"uniform vec3 diffuse;\nuniform float opacity;\nuniform float dashSize;\nuniform float totalSize;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\n\t\tdiscard;\n\t}\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <color_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n",
 linedashed_vert:"uniform float scale;\nattribute float lineDistance;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <color_vertex>\n\tvLineDistance = scale * lineDistance;\n\tvec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );\n\tgl_Position = projectionMatrix * mvPosition;\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n}\n",
 meshbasic_frag:"uniform vec3 diffuse;\nuniform float opacity;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <envmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\t#ifdef USE_LIGHTMAP\n\t\treflectedLight.indirectDiffuse += texture2D( lightMap, vUv2 ).xyz * lightMapIntensity;\n\t#else\n\t\treflectedLight.indirectDiffuse += vec3( 1.0 );\n\t#endif\n\t#include <aomap_fragment>\n\treflectedLight.indirectDiffuse *= diffuseColor.rgb;\n\tvec3 outgoingLight = reflectedLight.indirectDiffuse;\n\t#include <envmap_fragment>\n\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\n\t#include <premultiplied_alpha_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}\n",
@@ -432,10 +432,10 @@ points_vert:"uniform float size;\nuniform float scale;\n#include <common>\n#incl
 shadow_frag:"uniform float opacity;\n#include <common>\n#include <packing>\n#include <bsdfs>\n#include <lights_pars>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\nvoid main() {\n\tgl_FragColor = vec4( 0.0, 0.0, 0.0, opacity * ( 1.0 - getShadowMask() ) );\n}\n",shadow_vert:"#include <shadowmap_pars_vertex>\nvoid main() {\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n}\n"},ib={basic:{uniforms:Ca.merge([Q.common,
 Q.aomap,Q.lightmap,Q.fog]),vertexShader:R.meshbasic_vert,fragmentShader:R.meshbasic_frag},lambert:{uniforms:Ca.merge([Q.common,Q.aomap,Q.lightmap,Q.emissivemap,Q.fog,Q.lights,{emissive:{value:new E(0)}}]),vertexShader:R.meshlambert_vert,fragmentShader:R.meshlambert_frag},phong:{uniforms:Ca.merge([Q.common,Q.aomap,Q.lightmap,Q.emissivemap,Q.bumpmap,Q.normalmap,Q.displacementmap,Q.gradientmap,Q.fog,Q.lights,{emissive:{value:new E(0)},specular:{value:new E(1118481)},shininess:{value:30}}]),vertexShader:R.meshphong_vert,
 fragmentShader:R.meshphong_frag},standard:{uniforms:Ca.merge([Q.common,Q.aomap,Q.lightmap,Q.emissivemap,Q.bumpmap,Q.normalmap,Q.displacementmap,Q.roughnessmap,Q.metalnessmap,Q.fog,Q.lights,{emissive:{value:new E(0)},roughness:{value:.5},metalness:{value:.5},envMapIntensity:{value:1}}]),vertexShader:R.meshphysical_vert,fragmentShader:R.meshphysical_frag},points:{uniforms:Ca.merge([Q.points,Q.fog]),vertexShader:R.points_vert,fragmentShader:R.points_frag},dashed:{uniforms:Ca.merge([Q.common,Q.fog,{scale:{value:1},
-dashSize:{value:1},totalSize:{value:2}}]),vertexShader:R.linedashed_vert,fragmentShader:R.linedashed_frag},depth:{uniforms:Ca.merge([Q.common,Q.displacementmap]),vertexShader:R.depth_vert,fragmentShader:R.depth_frag},normal:{uniforms:Ca.merge([Q.common,Q.bumpmap,Q.normalmap,Q.displacementmap,{opacity:{value:1}}]),vertexShader:R.normal_vert,fragmentShader:R.normal_frag},cube:{uniforms:{tCube:{value:null},tFlip:{value:-1},opacity:{value:1}},vertexShader:R.cube_vert,fragmentShader:R.cube_frag},equirect:{uniforms:{tEquirect:{value:null},
-tFlip:{value:-1}},vertexShader:R.equirect_vert,fragmentShader:R.equirect_frag},distanceRGBA:{uniforms:Ca.merge([Q.common,Q.displacementmap,{referencePosition:{value:new p},nearDistance:{value:1},farDistance:{value:1E3}}]),vertexShader:R.distanceRGBA_vert,fragmentShader:R.distanceRGBA_frag}};ib.physical={uniforms:Ca.merge([ib.standard.uniforms,{clearCoat:{value:0},clearCoatRoughness:{value:0}}]),vertexShader:R.meshphysical_vert,fragmentShader:R.meshphysical_frag};Object.assign(hd.prototype,{set:function(a,
-b){this.min.copy(a);this.max.copy(b);return this},setFromPoints:function(a){this.makeEmpty();for(var b=0,c=a.length;b<c;b++)this.expandByPoint(a[b]);return this},setFromCenterAndSize:function(){var a=new D;return function(b,c){c=a.copy(c).multiplyScalar(.5);this.min.copy(b).sub(c);this.max.copy(b).add(c);return this}}(),clone:function(){return(new this.constructor).copy(this)},copy:function(a){this.min.copy(a.min);this.max.copy(a.max);return this},makeEmpty:function(){this.min.x=this.min.y=Infinity;
-this.max.x=this.max.y=-Infinity;return this},isEmpty:function(){return this.max.x<this.min.x||this.max.y<this.min.y},getCenter:function(a){a=a||new D;return this.isEmpty()?a.set(0,0):a.addVectors(this.min,this.max).multiplyScalar(.5)},getSize:function(a){a=a||new D;return this.isEmpty()?a.set(0,0):a.subVectors(this.max,this.min)},expandByPoint:function(a){this.min.min(a);this.max.max(a);return this},expandByVector:function(a){this.min.sub(a);this.max.add(a);return this},expandByScalar:function(a){this.min.addScalar(-a);
+dashSize:{value:1},totalSize:{value:2}}]),vertexShader:R.linedashed_vert,fragmentShader:R.linedashed_frag},depth:{uniforms:Ca.merge([Q.common,Q.displacementmap]),vertexShader:R.depth_vert,fragmentShader:R.depth_frag},normal:{uniforms:Ca.merge([Q.common,Q.bumpmap,Q.normalmap,Q.displacementmap,{opacity:{value:1}}]),vertexShader:R.normal_vert,fragmentShader:R.normal_frag},cube:{uniforms:{tCube:{value:null},tFlip:{value:-1},opacity:{value:1}},vertexShader:R.cube_vert,fragmentShader:R.cube_frag},equirect:{uniforms:{tEquirect:{value:null}},
+vertexShader:R.equirect_vert,fragmentShader:R.equirect_frag},distanceRGBA:{uniforms:Ca.merge([Q.common,Q.displacementmap,{referencePosition:{value:new p},nearDistance:{value:1},farDistance:{value:1E3}}]),vertexShader:R.distanceRGBA_vert,fragmentShader:R.distanceRGBA_frag}};ib.physical={uniforms:Ca.merge([ib.standard.uniforms,{clearCoat:{value:0},clearCoatRoughness:{value:0}}]),vertexShader:R.meshphysical_vert,fragmentShader:R.meshphysical_frag};Object.assign(hd.prototype,{set:function(a,b){this.min.copy(a);
+this.max.copy(b);return this},setFromPoints:function(a){this.makeEmpty();for(var b=0,c=a.length;b<c;b++)this.expandByPoint(a[b]);return this},setFromCenterAndSize:function(){var a=new D;return function(b,c){c=a.copy(c).multiplyScalar(.5);this.min.copy(b).sub(c);this.max.copy(b).add(c);return this}}(),clone:function(){return(new this.constructor).copy(this)},copy:function(a){this.min.copy(a.min);this.max.copy(a.max);return this},makeEmpty:function(){this.min.x=this.min.y=Infinity;this.max.x=this.max.y=
+-Infinity;return this},isEmpty:function(){return this.max.x<this.min.x||this.max.y<this.min.y},getCenter:function(a){a=a||new D;return this.isEmpty()?a.set(0,0):a.addVectors(this.min,this.max).multiplyScalar(.5)},getSize:function(a){a=a||new D;return this.isEmpty()?a.set(0,0):a.subVectors(this.max,this.min)},expandByPoint:function(a){this.min.min(a);this.max.max(a);return this},expandByVector:function(a){this.min.sub(a);this.max.add(a);return this},expandByScalar:function(a){this.min.addScalar(-a);
 this.max.addScalar(a);return this},containsPoint:function(a){return a.x<this.min.x||a.x>this.max.x||a.y<this.min.y||a.y>this.max.y?!1:!0},containsBox:function(a){return this.min.x<=a.min.x&&a.max.x<=this.max.x&&this.min.y<=a.min.y&&a.max.y<=this.max.y},getParameter:function(a,b){return(b||new D).set((a.x-this.min.x)/(this.max.x-this.min.x),(a.y-this.min.y)/(this.max.y-this.min.y))},intersectsBox:function(a){return a.max.x<this.min.x||a.min.x>this.max.x||a.max.y<this.min.y||a.min.y>this.max.y?!1:!0},
 clampPoint:function(a,b){return(b||new D).copy(a).clamp(this.min,this.max)},distanceToPoint:function(){var a=new D;return function(b){return a.copy(b).clamp(this.min,this.max).sub(b).length()}}(),intersect:function(a){this.min.max(a.min);this.max.min(a.max);return this},union:function(a){this.min.min(a.min);this.max.max(a.max);return this},translate:function(a){this.min.add(a);this.max.add(a);return this},equals:function(a){return a.min.equals(this.min)&&a.max.equals(this.max)}});oc.prototype=Object.create(V.prototype);
 oc.prototype.constructor=oc;var Of=0;Object.assign(N.prototype,oa.prototype,{isMaterial:!0,onBeforeCompile:function(){},setValues:function(a){if(void 0!==a)for(var b in a){var c=a[b];if(void 0===c)console.warn("THREE.Material: '"+b+"' parameter is undefined.");else if("shading"===b)console.warn("THREE."+this.type+": .shading has been removed. Use the boolean .flatShading instead."),this.flatShading=1===c?!0:!1;else{var d=this[b];void 0===d?console.warn("THREE."+this.type+": '"+b+"' is not a property of this material."):
diff --git a/build/three.module.js b/build/three.module.js
index fc8639201635b709b8e734f253170a926711b69c..040f404d2342caffb68278e6151a15c53aef4e0f 100644
--- a/build/three.module.js
+++ b/build/three.module.js
@@ -5790,7 +5790,7 @@ var distanceRGBA_frag = "#define DISTANCE\nuniform vec3 referencePosition;\nunif
 
 var distanceRGBA_vert = "#define DISTANCE\nvarying vec3 vWorldPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\tvWorldPosition = worldPosition.xyz;\n}\n";
 
-var equirect_frag = "uniform sampler2D tEquirect;\nuniform float tFlip;\nvarying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldPosition );\n\tvec2 sampleUV;\n\tsampleUV.y = saturate( tFlip * direction.y * -0.5 + 0.5 );\n\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\n}\n";
+var equirect_frag = "uniform sampler2D tEquirect;\nvarying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldPosition );\n\tvec2 sampleUV;\n\tsampleUV.y = asin( clamp( direction.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n\tsampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\n}\n";
 
 var equirect_vert = "varying vec3 vWorldPosition;\n#include <common>\nvoid main() {\n\tvWorldPosition = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}\n";
 
@@ -6107,15 +6107,10 @@ var ShaderLib = {
 
 	},
 
-	/* -------------------------------------------------------------------------
-	//	Cube map shader
-	 ------------------------------------------------------------------------- */
-
 	equirect: {
 
 		uniforms: {
 			tEquirect: { value: null },
-			tFlip: { value: - 1 }
 		},
 
 		vertexShader: ShaderChunk.equirect_vert,