This full program is available with WebDesigner Magazine issue 101.It's apparently worth £134 but for the cost of buying the magazine at £5.99 it's yours.I know it's an old version but if you want a bit of fun for practically no cash and turn out fairly good 3D landscapes for your websites or for your own amusement it's well worth it.I've been playing around with it and although it doesn't quite match up to Bryce 5 it does render pictures a lot faster than Bryce.It's easy to follow the tutorial and get a good picture or two.
Where it falls down is in importing objects.It cannot of course import any textures or materials and you will have to retexture or rematerial objects you import.
It is better than Terregen in one respect.You can have objects in your scenes.
Incog.