The reasons are these :
1. Developing a tool to provide 3-D image editing is relatively big job.
This is required to truly allow
a user to develop a track from scratch.
2. Although most of the track files have been 80-90% reverse engineered,
sufficient for modifying
tracks and developing convertors and such, the remaining 10-20% will
require a large investement in
time for experimentation. There are some numbers in the TRK files that
appear to produce no effect when
changed - others that produce some strange results (like warping your car
to another part of the track).
3. The monetary rewards for this just aren't there. A handful of people
would purchase such a product
and start posting tracks. At say $29 a copy (reasonable when you consider
the price of N2 itself), you
would have to sell a lot of copies to make any money. This is particularly
true when you consider the
man years of development effort required to write this program. Similar
3-D editor programs cost a lot
more - but this is just a game enhancement product.
4. Papyrus/Sierra hasn't done it and they have the best chance of being
successful at it. This is enough
in itself to convince me not to try and make money on it.