Generating procedural noise in V3d

Unfortunally, there’s no procedural noises supported for Maya yet.

Hi,
WebGL 1.0 (which is the only version supported on iOS devices now) can’t handle loops with non-constant comparisons. Try this code instead:

// General Noise Shader, returning a float (1D)
// Noise.osl by Zap Andersson
// Modified: 2019-11-26
// Copyright 2019 Autodesk Inc, All rights reserved. This file is licensed under Apache 2.0 license
//    https://github.com/ADN-DevTech/3dsMax-OSL-Shaders/blob/master/LICENSE.txt

shader Noise
[[ string help="A shader for generating more advanced noise" ]]
(
	point  UVW    = transform("object", P)
		[[ string help = "The UVW coordinate to use. When not connected, defaults to Object space" ]],	
	float  Scale  = 25.0,
	string Type   = "uperlin"
		[[ string widget= "popup", 
		   string help  = "Use perlin, uperlin, cell, hash, simplex or gabor",
		   string options="perlin|uperlin|cell|hash|simplex|gabor" ]],
	int   Octaves    = 4
		[[ string help = "Hos many layers of noise are mixed together" ]],
	float Lacunarity = 2.0
		[[ string help = "How much the 'frequency' of the noise changes per layer" ]],	
	float Gain       = 0.5
		[[ string help = "How much the amplitude of the noise changes per layer. Higher numbers means higher noise frequencies have more effect." ]],		
	
	int   StepFunction = 1 
		[[ string widget= "checkBox",
		   string label = "Step Function",
		   string help  = "Enables a per-layer smoothstep curve in the noise, allowing you to increase the 'contrast' of the noise" ]],
	float LowStep = 0.5
		[[ string help = "Low threshold of the smoothstep function.",
		   string label = "Low Step",
		   float  min = -1.0, float max = 1.0 ]],		
	float HiStep = 0.8
		[[ string help = "High threshold of the smoothstep function.",
		   string label = "High Step",		
		   float  min = -1.0, float max = 1.0 ]],		
	int   Normalize = 1 
		[[ string widget= "checkBox",
		   string help = "If the noise is auto-normalized to Amplitude or not." ]],
	float Amplitude = 1.0
		[[ string help = "The amplitude of the noise." ]],		
	float Phase     = 0.0
		[[ string help = "The 'Phase' is just a 4th coordinate of the noise, can be used to allow it to evolve over time, for example." ]],	
		   
	output float Out = 0,
)
{
	point pnt = UVW / Scale;
	
	float sum = 0;
	float curFreq = 1.0;
	float curAmp = Amplitude;
	
	// Loop over number of octaves
	for (int i = 0; i < 4; i++)
	{			
		// Compute a noise value
		float ns = noise(Type, pnt * curFreq, Phase + i);
		
		if (StepFunction)
			ns = smoothstep(LowStep, HiStep, ns);

		// Add our result to the output							
		Out += ns * curAmp;
		// Add the amplitude to the normalizing sum
		sum += curAmp;

		// Step up frequency and amplitude		
		curFreq *= Lacunarity;
		curAmp  *= Gain;		
	}
	
	if (Normalize)
		Out /= sum / Amplitude;
}

Also, we’re working on supporting noise shader in Maya. Check out the upcoming Verge3D preview release.