Many times when we have a bunch of small models all related to each other, they will all be modeled within the same file, even though they are not physically connected to each other. It would be very helpful if there was a way to create terrain model using a "Graphical Filter" along with a "Fence" so that you can just fence off a certain area within the file, and use the Graphical Filter to create the terrain from everything within the fence. Currently, when using a Graphical Filter, everything in the file gets pulled into the terrain, but many times we don't want it to do that. In example, there may be 2 small pads modeled in the same file using the same attributes, but we need separate terrains created from them. Currently, If you use a Graphical Filter to create the terrains, it tries to connect them together. We need the option to use a Fence along with the Graphical filter.