O.K.- I did something REALLY DRASTIC and read Vue 5 Infinite Manual- the section on importing DEMS- and they state in there that V5I supports 16 bit DEM data AND the importation of 16 BIT data in the TGA format. I did originally try using the TGA format but have done most of my terrain bitmap tests with TIF and PSD. I'm going back and try some tests with TGA again and see how they look. It MIGHT BE that TGA is the only bitmap format that E-ON is currently supporting for correct 16 Bit Terrain data. I was not happy with my original DEM imports into V5I because, even though you can do Multi-DEM imports, a lot of DEM data is unfortunately damaged with joint lines, "WALLS" etc. This is why I went with the BITMAP method. So converting SEAMLESS BIL data (which are free of nearly all seam and wall problems) and importing those into the Terrain Editor via 16 BIT TGA is what I'm trying now...