Attached Link: http://www.benbus.co.uk/tmp/hdr_test.zip

The higher resolution the HDRI image the better it looks in the background. (One of the samples on the CD is pretty huge.)If you use a bmp version of the HDRI file as a backdrop as well as a HDRI background you tend to get a result similar to above - bright background and dark reflective surfaces. But I haven't played much with the settings. I've made up a zip file which includes Terragen files,HDR file and C3 file for the image above so that anybody interested can see what settings I used. It's available at the link and weighs in at about 1.5Mb. One note, I'm using Terragen version 0.9. I'll post a link shortly for the upgrade. Mark