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    Fade Transition Node

    Description

    Fade Transition is a method of adding noise to add variation while a function transitions from on to off. This node takes in a fade value and remaps it using the noise value (usually from a texture). When FadeValue is 0, the output is always 0, and when FadeValue is 1, the output is always exactly 1. In between 0 and 1 the transition will follow the pattern in the noise.

    This Node is commonly used as an input to Alpha on a Master Node to provide an LOD transition.

    Ports

    Name Direction Type Binding Description
    Texture Input Texture 2D None Input value
    Noise Input Float None The noise variation to apply to the fade function
    FadeValue Input Float None The amount of transition to apply
    FadeContrast Input Float None The contrast at which a single pixel goes from fully transparent to fully opaque. Higher values cause sharper edges in the transition
    Fade Output Float None The resulting fade value

    Generated Code Example

    The following example code represents one possible outcome of this node.

    float Unity_FadeTransitionNode_ApplyFade_float(float noise, float fadeValue, float fadeContrast)
    {
        float ret = saturate(fadeValue*(fadeContrast+1)+(noise-1)*fadeContrast);
        return ret;
    }
    
    float Result = Unity_FadeTransitionNode_ApplyFade_float(
            _NoiseValue,
            _FadeValue,
            _FadeContrast);
    
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