Here is a link to a short animation created using a 360 image exported from my shiny new Terragen 3. I compd it in after effects using trapcode horizon. I had tried different size images, this 360 image was 5k pixels wide and x tall. 51mb image, but the quality in the comp was much higher. The image is not super fancy, I just started in so much to learn. I exported a depth map from blender, of a character from an animation I'm creating, to see if I could use it in the heightfield dept. as an experiment Im pretty happy with it. I set it up for final render in premiere pro. The a/e render was 2.8 gb holy cow!
https://www.youtube.com/watch?v=wZ0_us8at6Q