In the following PG the Minimap camera stay always under the Main Camera. If I switch the order how the cameras are added in the active cameras (line 30 <-> 31) the minimap appears over the main camera BUT the ONMOUSEOVER stop working (mouse over the red sphere)   http://www.babylonjs-playground.com/#10VU59   Can the Mouse events work in both camera?   What for are there lines?   mm.renderingGroupId = 1;mm.layerMask = 1;