Alain wrote:

> Are you tracing against the actual surface, or the water's surface?
> 
> For the last image, you may be between the water and the ground. Try to 
> make your water transparent and hollow and see what it gives.

I tried that, but it didn't work... but then, I separated the original 
union of isosurface and "water sphere" and traced just against the 
isosurface - and then it worked! Nevertheless, thank you for your hint 
(and be prepared to find your name one day in some of my other planetary 
systems)!

Then I also applied double_illuminate to get rid of the strange 
shadows... below is the result: Lake Glatzer as seen from Jawand Island 
at "pedestrian perspective", i. e. 1.7 metres above ground, looking 
approximately northward (five degrees to the east)...

And now the next, probably much more difficult problem: currently I only 
use a granite pattern for the terrain isosurface (plus some large-scale 
bozo for global height variation), so it generally looks like smooth 
sand dunes or loess hills - which would be perfect if I intended to 
model the whole planet after some parts of northern Afghanistan, but I'd 
rather go for more rugged mountains, as in fact they tower up to 30 
kilometres (!) high in many parts.

I think applying some small-scale noise could do the trick - but how can 
I restrict that noise to medium and high altitudes only while leaving 
the lower parts smooth?

See you in Khyberspace!

Yadgar

Now playing: Anne Boleyn "The Day thou gavest Lord hath ended" (Rick 
Wakeman)

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