The basic Perlin and Simplex noise shaders are outputting values between -1 and 1, so the result is clamped to mostly black. Half of the gradient is missing.
The last line of perlin2d.gdshaderinc should be:
return (2.3 * n_xy + 1.0) * 0.5;
Then the noise has the full normalized range, and looks the way it's supposed to:
The basic Perlin and Simplex noise shaders are outputting values between -1 and 1, so the result is clamped to mostly black. Half of the gradient is missing.
The last line of perlin2d.gdshaderinc should be:
return (2.3 * n_xy + 1.0) * 0.5;Then the noise has the full normalized range, and looks the way it's supposed to: