Greg M. Johnson wrote:
> I've played around with some "animations" where I am really testing
> out a parameter space (fractals: camera position; hetero_mf's:
> parmeters).
>
> I set up a #declare RRR=seed(frame_number);

> Problem is, a couple times when I was printing out the random values,
> I noticed that every nth one were decreasing monotonically.

Every nth what? This must be every nth random stream, not every nth value 
within the same random stream.

The random streams are not random from each other. Only the numbers within a 
random stream are random from each other.

> Q: is this expected behavior or already known?

Yes.

When you use #declare RRR=seed(frame_number); then each stream will relate 
to the other streams in a predictable non-random manner.

Rune
-- 
http://runevision.com

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