Merge branch 'fix-multifrustum' into fix-pick-position

Source/Scene/Scene.js

@@ -2485,7 +2485,7 @@ define([
                 // PERFORMANCE_IDEA: Use MRT to avoid the extra copy.
                 var depthStencilTexture = renderTranslucentDepthForPick ? passState.framebuffer.depthStencilTexture : globeDepth.framebuffer.depthStencilTexture;
                 var colorTexture = passState.framebuffer.getColorTexture(0);
-                var pickDepth = getPickDepth(scene, index);
+                var pickDepth = scene._picking.getPickDepth(scene, index);
                 pickDepth.update(context, depthStencilTexture, colorTexture);
                 pickDepth.executeCopyDepth(context, passState, usePrimitiveFramebuffer, picking);
             }