Updated builds.

build/three.js

@@ -13892,12 +13892,21 @@
 
 	var fov = 90, aspect = 1;
 
-	function CubeCamera( near, far, cubeResolution, options ) {
+	function CubeCamera( near, far, renderTarget ) {
 
 		Object3D.call( this );
 
 		this.type = 'CubeCamera';
 
+		if ( renderTarget.isWebGLCubeRenderTarget !== true ) {
+
+			console.error( 'THREE.CubeCamera: The constructor now expects an instance of WebGLCubeRenderTarget as third parameter.' );
+			return;
+
+		}
+
+		this.renderTarget = renderTarget;
+
 		var cameraPX = new PerspectiveCamera( fov, aspect, near, far );
 		cameraPX.up.set( 0, - 1, 0 );
 		cameraPX.lookAt( new Vector3( 1, 0, 0 ) );
@@ -13928,18 +13937,12 @@
 		cameraNZ.lookAt( new Vector3( 0, 0, - 1 ) );
 		this.add( cameraNZ );
 
-		options = options || { format: RGBFormat, magFilter: LinearFilter, minFilter: LinearFilter };
-
-		this.renderTarget = new WebGLCubeRenderTarget( cubeResolution, options );
-		this.renderTarget.texture.name = "CubeCamera";
-
 		this.update = function ( renderer, scene ) {
 
 			if ( this.parent === null ) { this.updateMatrixWorld(); }
 
 			var currentRenderTarget = renderer.getRenderTarget();
 
-			var renderTarget = this.renderTarget;
 			var generateMipmaps = renderTarget.texture.generateMipmaps;
 
 			renderTarget.texture.generateMipmaps = false;
@@ -13972,8 +13975,6 @@
 
 			var currentRenderTarget = renderer.getRenderTarget();
 
-			var renderTarget = this.renderTarget;
-
 			for ( var i = 0; i < 6; i ++ ) {
 
 				renderer.setRenderTarget( renderTarget, i );
@@ -14094,11 +14095,7 @@
 
 		scene.add( mesh );
 
-		var camera = new CubeCamera( 1, 10, 1 );
-
-		camera.renderTarget = this;
-		camera.renderTarget.texture.name = 'CubeCameraTexture';
-
+		var camera = new CubeCamera( 1, 10, this );
 		camera.update( renderer, scene );
 
 		mesh.geometry.dispose();

build/three.module.js

@@ -13878,12 +13878,21 @@ PerspectiveCamera.prototype = Object.assign( Object.create( Camera.prototype ),
 
 var fov = 90, aspect = 1;
 
-function CubeCamera( near, far, cubeResolution, options ) {
+function CubeCamera( near, far, renderTarget ) {
 
 	Object3D.call( this );
 
 	this.type = 'CubeCamera';
 
+	if ( renderTarget.isWebGLCubeRenderTarget !== true ) {
+
+		console.error( 'THREE.CubeCamera: The constructor now expects an instance of WebGLCubeRenderTarget as third parameter.' );
+		return;
+
+	}
+
+	this.renderTarget = renderTarget;
+
 	var cameraPX = new PerspectiveCamera( fov, aspect, near, far );
 	cameraPX.up.set( 0, - 1, 0 );
 	cameraPX.lookAt( new Vector3( 1, 0, 0 ) );
@@ -13914,18 +13923,12 @@ function CubeCamera( near, far, cubeResolution, options ) {
 	cameraNZ.lookAt( new Vector3( 0, 0, - 1 ) );
 	this.add( cameraNZ );
 
-	options = options || { format: RGBFormat, magFilter: LinearFilter, minFilter: LinearFilter };
-
-	this.renderTarget = new WebGLCubeRenderTarget( cubeResolution, options );
-	this.renderTarget.texture.name = "CubeCamera";
-
 	this.update = function ( renderer, scene ) {
 
 		if ( this.parent === null ) this.updateMatrixWorld();
 
 		var currentRenderTarget = renderer.getRenderTarget();
 
-		var renderTarget = this.renderTarget;
 		var generateMipmaps = renderTarget.texture.generateMipmaps;
 
 		renderTarget.texture.generateMipmaps = false;
@@ -13958,8 +13961,6 @@ function CubeCamera( near, far, cubeResolution, options ) {
 
 		var currentRenderTarget = renderer.getRenderTarget();
 
-		var renderTarget = this.renderTarget;
-
 		for ( var i = 0; i < 6; i ++ ) {
 
 			renderer.setRenderTarget( renderTarget, i );
@@ -14080,11 +14081,7 @@ WebGLCubeRenderTarget.prototype.fromEquirectangularTexture = function ( renderer
 
 	scene.add( mesh );
 
-	var camera = new CubeCamera( 1, 10, 1 );
-
-	camera.renderTarget = this;
-	camera.renderTarget.texture.name = 'CubeCameraTexture';
-
+	var camera = new CubeCamera( 1, 10, this );
 	camera.update( renderer, scene );
 
 	mesh.geometry.dispose();