Terragen images DO look great, but I've never seen a single image done with that program that I could not do with Bryce 4, much less 5. There are no trees in Terragen, no foliage options that I know of. The skies are wonderful, but alas, so are Brycean skies with a bit of tweaking. Also, Bryce's volumetrics blow away anything from the other "small apps". The REAL price to pay is render time! Perhaps when Teragen grows up a bit I'll consider using it, but I wouldn't go back to Bryce 3D, and until it catches up with Bryce or Vue, and offers some competition, then it's not quite ripe for me...