I have a drag and drop editor. I have all the droppable elements on either one of two layers, level1 and level2. the user switches between these levels so they can place some things on one and some things on the other. this is mostly controlled by setting the visibility or invisibility of the layers. There is already a condition which limits the placement of one of these elements if it overlaps another element, however the problem i have is that the elements won't place if they are overlapping an invisible element on the other layer. Is there a way i can get around this? perhaps set the collisions to be only for visible instances or instances on the same layer?