Feature request - lines/edges in section view

Hi, I find the section view very useful, but it is hampered by the fact that it merges all the material surfaces into one shaded area. Generally speaking, one of the main purposes for using a section view is to show the layers of a slice through multiple objects. Without some demarcation of the regions this becomes pretty pointless for anything other than seeing into internal voids. Please add edge lines to the section view so that we can see the layers of the items we are slicing through. Or even better, add the edge lines and the ability to assign materials to parts with different section shaders.