That is quite an interesting image, Kadri. It gives a feeling of 'past-times in the future', like you're seeing remnants of a once alien presence. I am quite curious how you made the vague models, I suspect they are glass plus some fractal dots for the white densities in the glass? Hence perhaps the long rendertime, as that is awfully long!
And it would need 'force all edges', as there are some parts missing in the rock.
But I really like the overall mood and expanse!