High!

clipka wrote:

> (a) an optical illusion? (maybe you have the pole's co-ordinate wrong and drawn
> inward, giving you "only" a shadowed dent)

Almost certainly not - I tried the north pole close-up view with an 
additional light source directly overhead, and the black hole remained!

> (b) a scale or precision related issue?

I wouldn't rule out this... at the moment, I try a scaling divisor of 1 
(!), strangely, radiosity gets extremely slow now!

See you in Khyberspace!

Yadgar

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