Hi mogeley.
I’ve just watched the Sims youtube terrain building video.
I agree, it does look easy. That’s because it’s very inflexible and designed for people at all skill levels to get a reasonable result very quickly. Great for beginners, but as soon as you become proficient, Trainz has much more versatility with many more tools, enabling a much more professional and realistic looking end product. Surveyor already does all of the things that you suggest, with the exception of automatic terrain texturing. Who would want that in Trainz? It would be a retrograde step IMHO.
I could see no method of adding and blending textures, much less the ability to create and add your own textures, or those of others. Texturing is one of the joys of Trainz Route creation. It allows an infinite number of end results and the ability to create prototypical landscapes. Everyone’s creations are therefore totally unique, as is evident with what you can see in the Screenshots section.
And we’ve not even looked at the effect different skies, water, time of day, good and bad weather fog can add to the atmosphere. Something which the Sims landscape seems to be sadly lacking.
I always have to thank the creators for providing and sharing such great stuff, whether it is a new loco, improved tracks, derelict stuff, buildings, vegetation, new routes .. the list is endless. It is they who have raised the bar with ever improving assets and reskins. Some of the work is breathtaking. That is where the real advances have been made IMHO. Treat those creator well everyone!
With regard to building high on one “tile”, by which you presumably mean one baseboard, 750metre by 750 metre, where in the world does a cliff or mountainside like that exist? I cannot find it here
http://en.wikipedia.org/wiki/Cliff
Cheers
Casper