Hardware
It has to be said, I suffered the very same problems with my own routes, they stuttered on run. To combat this I did several things. First I upgraded my PC to a 3.4 Gig Processor and had 4 Gig of RAM put in. The shop also installed a good video card with its own RAM on board.
Then, and as in real life I cannot see for ever, I went into Preferences and pulled on a fair whack of Daytime Fog effect and while I was at it reduced both Draw Distances because if the fog cuts down distance vision then you don't need full draw distance, do you?
These cured all problems. A bit expensive, but it worked. To do a job you need the right tools and for Trainz a PC with good specs. If you enjoy running it invest in a decent machine to run it on. It's your hobby after all and we all know how easy it is to get hooked.
I agree with the sentiments about not seeing a bucket in a garden as you whizz past at goodness knows what speed. So I put detail by the tracks and reduce it as the distance from them increases, and I reduce detail very quickly now. The one thing I do not stint on are trees, because they big and therefore are visible for a great distance.
The built-in view distance in 2004 (in which I build routes) is limited anyway, even at full stretch, so I put nothing at all once scenery reaches 1200 feet each side from track centres, there is little point, but I do put in a backscene.
The run my routes a little better just fiddle with the Preferences first, it works and costs nothing. And I find by removing the heads-up in Driver you get an extra notch on the frame rate. Yes, I do check frame rates, I know folk won't believe me, but I do! I have FRAPS running when I build in Surveyor.
The route I am working on now is the second section from Theale to Westbury which will butt nicely to the first part that runs from Paddington to Theale. It does, I tried it. UK of course, and on the line running from Paddington to Penzance. Because it runs west I called it WCL (west coast line, which it isn't of course).
For this section you will need the ATLS assets as they are fitted to the road crossings. These are good assets and will work with lift or swing bridges too.
Bless all Trainzers,
Angela