It looks like your image with strata is projected through the camera as the strata in the distant cliffs is perfectly aligned (and is the same scale) with the strata in the nearby cliffs. That can seem unnatural. Using an Imagemap for coloured strata layers is probably better implemented using X or Cylindrical projections. I've put this one together to illustrate how the Cylindrical projection looks. You'll find the tgd below. I've also provided you with a low resolution version (the original is more than 3 Mb) of the image I used in the Imagemap shader. When you first open the tgd file you'll get an error message cos it won't be able to find the image. Either insert this low res image into the Imagemap shader, or one of your own. You can see that the image itself isn't a strat image, just some coloured noise. So you can see how cool the Cylindrical projection can be in converting it to strata. When you've got the tgd loaded you'll see that the Imagemap is filtered through a Warp shader. To see what the strata looks like without the warping, just unhook the Warp shader from the Surface layer Colour input, and hook the output from the Imageshader straight into that Colour input.
John
