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I created a simple shader to subdivide a circle in a specified number of bands. Each bands has a number between 0 and 1 and the factor (color) for each band is (previous bands + 1/NumberOfBands); I would like to know if there is a way to obtain a random number for each band ( between 0 and 1 possibly ) i.e. a number not related to the previous (or the following) band.

It would be perfect a node that output a random number with a seed option, and I can plug the color in the seed, any one know if there is an addon for that?

bands

Parmex
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Since most earlier answers to this question, Blender has provided a discontinuous White Noise texture node. Even the smallest change in its 'coordinate' will produce a completely new output in the 0-1 range...

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.. so your seed can simply be an addition to the 'W' input of the 1D version.

enter image description here

Here, keyed, but could be driven by #frame, location, or whatever is appropriate to your case.

Robin Betts
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  • Thank you, this worked! Maybe you can leave here this answer, could be useful for other people to see how to use the white noise – Parmex Feb 27 '21 at 14:08
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    I'd keep the answer ! It perfectly answers the question while mine was more a general one on a broader question. :) – Gorgious Feb 27 '21 at 14:42