This is an update from before.  In this case, the display goes out much further and shows the heightmaps working for different resolutions.  However, there is still much to be done.  The different resolutions need to be sewn up (hence the black openings), the  normals need to be corrected, and further resolution and scaling need to be tweaked.  So more to come, but it's progress.  The capture software really kills the frame rate (and I HAVE do the game in windowed mode, unfortunately).  I get over 60 FPS in 4K, so in 1080p windowed that this was captured in isn't representative of the speeds.