Hi people.

In upres node in noise settings we have noise type parameter.
Noise type parameter contain 7 types of noises (that's cool).
If we dive in structure of upres node, we can find what for upres houdini use curl noise 4d.

“When the output is 4D noise, the Noise Type parameter has no effect and only Perlin Noise is used. ” - that's from Houdini help

So I make some tests and see… there is no difference between perlin, original perlin, sparse convolution and alligator noises, but between analytic types of noises we have difference, because step size ignored.

that's mean - we have choice without any choice.

Am I right or all wrong?

sorry for my bad english.