I know it can't be done in TG but can any one think of another program that might be able to do it before re importing it o TG.
You could try one of the old programs like wilbur or terrabrush or so.
Another way could be to convert the ter file to sgi or tif and do it in
an image editor.
For the latter: http://www.planetside.co.uk/forums/index.php?topic=2117.0
cheers looks like my best bet
Brilliant ;D It works - good trick to remember, thanks again.