I just ran a test with a 100x100 pixel solid grey heighmap, but specified the georeference to be (10,0) (10,10) (0,10) (0,0). It looks like the heightmap creates a Y-directed feature rather than a normal-directed feature (image attached). I recall reading about this issue earlier in the forums but can't locate that post.
Is it planned to support normal-directed heighmaps so that one could e.g. create a heightmap covering large areas of the planet surface? If so, is there an approximate timeframe?