Thank you both. I see what you mean merrak. I'm 50/50 on this. From a fractal nut's point of view there's some interesting stuff inside those shadows that I haven't explored yet and it might have been nice to see more of it.

Lyle - It always surprises me how throwing a few numbers around on a trial and error basis can produce such amazing structures and now M3D has Voxel Stack, we can even produce 3D meshes in .obj format from them.

yes that is truly amazing !
on the other hand, even if seldom may happen the contrary, yesterday i make more then 20 renders all with very different values to find out that most of the result were basically identical, even if the navigator preview was showing dramatic variations

Luckily 3 were good as self standing fractal, the others good material for manipulations (that most likely i will never found the time to do..)

The navigator isn't 100% but it's a great way to explore when it works properly, which it usually does.

Erisian maybe you may explain a mistery:
often i saw interesting objects but too far...the weird thing is that if i try to zoom in they become bigger but also more and more ghostly, till they vanish.

and to me a mystery i will understand the opposite, if they would vanish zooming out

i always forgot to ask on fractalforums...maybe you know why that happens ?

It's because you are too close to something. Turning the depth right down in lighting can sometimes help but if you can find out what you are close to and navigate around it somehow, you might be able to reach the object. I usually give up!