NodeMaterial: Add Noise2DNode, Noise3DNode, Fractal3DNode.

[donmccurdy]

Names and parameters following the MaterialX noise specification, but omitting cell noise and worley noise for now. GLSL from https://github.com/ashima/webgl-noise (MIT License).

Changes:

• ✅ Add Noise2DNode: 2D Perlin noise.
• ✅ Add Noise3DNode: 3D Perlin noise.
• ✅ Add Fractal3DNode: 3D Fractional Brownian noise, created by summing several octaves of 3D Perlin noise, increasing the frequency and decreasing the amplitude at each octave.
• ❌ Remove NoiseNode.

Related issue: #20541

/cc @sunag

[Mugen87]

FYI #21801

[donmccurdy]

I'd also be fine with keeping the existing noise node — is it simplex noise? — with a more specific name. I didn't see it used anywhere currently, though, and so assumed it was probably fine to remove in favor of these options from MaterialX.

[mrdoob]

Thanks!