Originally Posted by
payre
RFB your methods both work, but you can also drape an image onto a terrain in Autocad if you turn it into a material first.
It will still require some "fixing" in Navisworks but if you keep the proportions of you image and the object it's draped onto the same it's normally just a material of scaling the resultant presenter material in Navisworks by a factor of 100.
The most hassle free way I've found to do this is through Sketchup. A draped image in Sketchup always seems to come into Navisworks perfectly.