hello gerhard. your fractal generated work is well done in its nature. (i dont even have a clue how to programm povray pics) but i know the potential of the renderer.
and i think you could do something about your textures.
perhaps you could try extensive use of bump maps on the terrain and objects.
the bumps are only to be seen in the very closeups. (saucer)
the design of fractals and making pics out of it is open to argument.
just my two cents are, that the human brain wants to see something familiar.
fractals are very unnatural (exept of molecual struktures or snowflakes perhaps, but even those are not always regular) so it seems to me thats its difficult to see something attracting for a human being in a fractal object.
to me it appears like what it is: a visualized mathematical formula. not attracting
on the other hand, using fractals for some kind of objectPARTS is very usual. think of reptiles skin or insect eyes or something comparable.
so my tip is to either work different fractal structures together to get irregularity or place fractal accuracy onto organic (life?)forms.
and always try to achieve a stunning real lighting! this could take your work to another level i think.
3 stars from me