For illustrating the other changes too:

http://www.schunter.etc.tu-bs.de/~chris/files/noise_generator_beta6.png
http://www.schunter.etc.tu-bs.de/~chris/files/noise_generator_beta7.png

Also note that with 'gradient x triangle_wave' (which should look
identically) the problem does not occur.

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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