Version: 12.09 Pro dev build 1
I made a large terrain design map 32K in size with 1 meter resolution and a DM of 128 and mosaic. I then resized the design map at 8K with a 16 meter resolution and a Dm of 16 no mosaic and saved the project. This would be equivlent to the 32K design. I do this becasue mosaics take a consideable amount of time to process. When I ran the HF off it still processes it as mosaic which again still takes a lot of time but not near as much as a 32K map would. It saved it as one HF but it processed it as mosaic even though mosaic was unchecked.
I went to view the map in 3D. It was in fly mode at the time and I hit the space bar. When I hit the space ar again now I enter fly mode but when I let off the e key the camer gently falls to the map.
edit: OK I closed the program out, restarted it and now fly mode works
Love the preview mode and it helped a bunch to get the scale correct.