With respect to the report of sombrero.pov breaking with +b2:

"LoneStar" <nomail@nomail> wrote:
> Ooooo, and +B2 breaks sombrero.pov (right half gets cut off completely!).
>

It turns out that the behaviour changes significantly with changes to the
value for NumIterations: 1-10 show only the left half; 11-13,15 render OK;
14 gives a small distortion in the top-middle; 16 gives black distortions
all along the middle vertical. At higher values you get ever changing but
similar distortions.

I've tried a couple of changes to see where the error originates;
hand-calculating Increment, not using all the translations (for instance
everyting is on y=0 instead of rippled), using different ranges for Xc and
Zc, removing the union { } block, using "sphere { 0,1 }" instead of the
BasicShape definition inside the loops, removing the object { } block. In
all these cases the distortions remain the same.

All attempts using the same changes & values for NumIterations without +b2
seem to give no problem at all.

Jeroen.

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