Mention the range somewhere

[mruegenberg]

Some people implement noises to be between 0 and 1, other implementations (liket the Simplex noise here?) are between -1 and 1.

It would be helpful to just mention the range somewhere, so no one is left guessing.

[stegu]

Yes, we should mention that. Thanks for the suggestion. Having said that, noise with a range 0 to 1 is what interactive material editors and some shading language wrappers have been providing for convenience, but the underlying "raw" function as such has always been zero mean. ​

[stegu]

Mentioned it prominently on the wiki page. I think that's enough, I won't touch the source files for now.