2 GB/hr Memory Leak on levels that are not enclosed

2 GB/hr Memory Leak on maps with no Sky Sphere or Atmospheric Fog to occlude empty space. The leak also occurs during general usage, but was tested with a blank project and an absolutely blank level.

https://answers.unrealengine.com/questions/370172/memory-leak-inside-410411-44mbs.html
https://answers.unrealengine.com/questions/378460/memory-leak-caused-by-viewport-rendering.html

1. Create a blank project
2. Make a new, blank map
3. Go to Edit>Editor Preferences
4. Find General>Miscellaneous and enable "Show Frame Rate and Memory"
5. Close preferences
6. Click in the viewport
7. Wait with the editor in focus (slows down if editor loses focus)

Result: Memory rises at a rate of about 0.5 MB/second or 2 GB/hour
Expected: With nothing in the map, the memory usage is expected to remain constant.

Note: This occurs with other levels that aren't blank too, simply delete the sky sphere/Atmospheric Fog and zoom out so you can see off into the distance