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Thanks for that last tidbit, SBF.
The other main thing I'm wondering about, that I've actually seen done, is how you do those rounded hills, like the ones shown in the image 92scotland posted back on the first page of this thread.
The other thing I'm thinking about, but haven't seen actually done, is whether there is a way to do trees somehow. It's not really possible, or at least not at all practical, to do real elevation changes, but being able to give an impression of the track going through a forest would be nice, if it can be done.
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