Functions in Sandbox.Utility.Noise don't return values in the correct range

[Willco2]

Describe the bug

All functions in the Noise class return values in the [0.25, 0.75] range.

To Reproduce

1. Create a component with this code
2. Add the component to a GameObject and look near the world origin

Expected behavior

The Noise functions should return values in the [-1, 1] range.

Media/Files

The red line represents 0, so there should be values below it as well.

Additional context

No response