Redrobes, that's a really great little program. It works a charm with 8 bit greyscale BMPs straight from Wilbur, but I can't seem to get it to load anything else - it just complains that the BMP isn't present. Is there some way to tell it to look for an HF2 or a PNG?

Also, I'm having trouble with the colour file. I'm outputting BMP texture files from Wilbur, with lighting settings off, but when I load it in Dragon Flight it colours the whole terrain seemingly randomly with one of the shades in the colour file. Am I doing something wrong?

In any case, thanks very much for the suggestion. I'll be putting this to good use from now on.