"Edward Coffey" <e.c### [at] ugradunimelbeduau> wrote in message
news:3967e406@news.povray.org...
| >   Now, this is interesting. For no apparent reason a quite chaotic pattern
| > (with greenish-yellow coloration) has appeared seemingly from nowhere
|
| I assume the sky is, as it appears, just a plain gradient without patterns
| or turbulence.  What happens when you change the ground to just a flat,
| plain colour?  If the pattern is still there, could you post a close-up?

It's pretty obvious to me that it's the caustic on the textured ground, more
or less directly in line with the light source and sphere segment, showing up
as a magnified refraction.  That's has to be the explanation.

Bob

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