I've been playing around with the idea of procedurally-generated areas of terrain, allowing for (in theory) infinitely large areas to explore. Unfortunately, there's no trigger function to remove permanent "craters", so after a few executions of the trigger, my terrain looks like the Swiss alps... 
Does anyone know how to remove permanent terrain deformations with a script? Or even a GUI trigger I've somehow overlooked? Thanks in advance!

Does anyone know how to remove permanent terrain deformations with a script? Or even a GUI trigger I've somehow overlooked? Thanks in advance!