update PR

src/extras/PMREMGenerator.js

@@ -107,9 +107,11 @@ class PMREMGenerator {
 	 * @param {number} sigma
 	 * @param {number} near
 	 * @param {number} far
+	 * @param {Number} size
+	 * @param {Number} position
 	 * @return {WebGLRenderTarget}
 	 */
-	fromScene( scene, sigma = 0, near = 0.1, far = 100 ) {
+	fromScene( scene, sigma = 0, near = 0.1, far = 100, size = 256, position = new Vector3( 0, 0, 0 ) ) {
 
 		_oldTarget = this._renderer.getRenderTarget();
 		_oldActiveCubeFace = this._renderer.getActiveCubeFace();
@@ -118,12 +120,12 @@ class PMREMGenerator {
 
 		this._renderer.xr.enabled = false;
 
-		this._setSize( 256 );
+		this._setSize( size );
 
 		const cubeUVRenderTarget = this._allocateTargets();
 		cubeUVRenderTarget.depthBuffer = true;
 
-		this._sceneToCubeUV( scene, near, far, cubeUVRenderTarget );
+		this._sceneToCubeUV( scene, near, far, position, cubeUVRenderTarget );
 
 		if ( sigma > 0 ) {
 
@@ -320,7 +322,7 @@ class PMREMGenerator {
 
 	}
 
-	_sceneToCubeUV( scene, near, far, cubeUVRenderTarget ) {
+	_sceneToCubeUV( scene, near, far, position, cubeUVRenderTarget ) {
 
 		const fov = 90;
 		const aspect = 1;
@@ -372,17 +374,20 @@ class PMREMGenerator {
 			if ( col === 0 ) {
 
 				cubeCamera.up.set( 0, upSign[ i ], 0 );
-				cubeCamera.lookAt( forwardSign[ i ], 0, 0 );
+				cubeCamera.position.set( position.x, position.y, position.z );
+				cubeCamera.lookAt( position.x + forwardSign[ i ], position.y, position.z );
 
 			} else if ( col === 1 ) {
 
 				cubeCamera.up.set( 0, 0, upSign[ i ] );
-				cubeCamera.lookAt( 0, forwardSign[ i ], 0 );
+				cubeCamera.position.set( position.x, position.y, position.z );
+				cubeCamera.lookAt( position.x, position.y + forwardSign[ i ], position.z );
 
 			} else {
 
 				cubeCamera.up.set( 0, upSign[ i ], 0 );
-				cubeCamera.lookAt( 0, 0, forwardSign[ i ] );
+				cubeCamera.position.set( position.x, position.y, position.z );
+				cubeCamera.lookAt( position.x, position.y, position.z + forwardSign[ i ] );
 
 			}