1 files changed, 5 insertions, 0 deletions

diff --git a/js/helper-classes/3D/view-utils.js b/js/helper-classes/3D/view-utils.js
index 919f7c50..48d4cacf 100755
--- a/js/helper-classes/3D/view-utils.js
+++ b/js/helper-classes/3D/view-utils.js
@@ -288,6 +288,11 @@ exports.ViewUtils = Montage.create(Component, {
         value: function( localPt,  elt ) {
             this.pushViewportObj( elt );
             var viewPt = this.screenToView( localPt[0], localPt[1], localPt[2] );
+                        if ((elt == null) || (elt === this._stageElement))
+                        {
+                                this.popViewportObj();
+                                return viewPt;
+                        }
             var mat = this.getMatrixFromElement( elt );
             var worldPt = MathUtils.transformPoint( viewPt, mat );
             var stageWorldPt = this.postViewToStageWorld( worldPt, elt );