Adding noise3d support

[vorg]

e.g.

 function noise3D(x, y, z, out) {
    out[0] = random.noise3(x, y, z);
    out[1] = random.noise3(y - 19.1, z + 33.4, x + 47.2);
    out[2] = random.noise3(z + 74.2, x - 124.5, y + 99.4);
    return out;
  }

[dmnsgn]

And curl noise too?

[vorg]

Yes. We should probably think of compatibility with pex-shaders if possible.

[dmnsgn]

Yes. We should probably think of compatibility with pex-shaders if possible.

Or not as prng/seeds would be different (unless...?).

[vorg]

You could check if prng is possible but i guess it would be driver specific ...