Hello Matt,
Thanks for that - I will PM you.
I have downloaded the demo of TG 4.1, & it is extremely powerful & impressive. However, as I already own Vue Studio 16, World Machine 2, & GeoGlyph 2, I'm not currently looking for another full programme. Rather, I was hoping to indulge in a little bit of nostalgia, as TG 0.9.43 was what got me into terrain generation - & subsequently 3D art - in the first place. Unfortunately I no longer have my substantial collection of DEMs, surface mats, atmospheres etc. etc. from those days, so I'm going to be a bit limited for a while!!
Thanks again,
Bernie