> You're right. Here are some images for comparison:
>
> 1) Rendered with POV-Ray 3.1g
> 2) Rendered with POV-Ray v3.5 b7 noise_generator 1
> 3) Rendered with POV-Ray v3.5 b7 noise_generator 2
> 4) Rendered with POV-Ray v3.5 b7 noise_generator 3
> 5) Rendered with POV-Ray v3.5 b7 noise_generator 1 +a0.1 +am2
(really weird)

huh? what's that moire in 5) ?

> The three noise_generators in POV-Ray 3.5 look pretty similar. Noone
looks
> close to the 3.1 version. Now I understand why I had so much trouble
while
> converting one of my wood textures from POV 3.1 to POV 3.5...

maybe one should note in povray.b-t or maybe it's due to the broken
agate (must be a wild guess - what does spiral1 or turbulence has to
do with that?).
But I'm falling asleep now - it's already tomorrow.

cukk

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