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Shading Nodes

The Shader Input nodes provide the specific sampling functionality used in Nodal Shading, providing values based on various scene related parameters. The resulting samples can be fed into texture channels to produce unique effects not possible with the Shader Tree alone. The shader Channel Modifiers provide some additional functionality to control the colors in intuitive ways. These elements combined with the various Shader Tree Item Layers and the Channel Modifiersin a schematic graph provide a very powerful way to wield Modo's shading power.

Shader inputs
	Illuminate Node	The Illuminate node is used to sample the light that falls onto a given surface.
	Raycast Node	The Raycast node adds the ability to fire rays based on user defined criteria, gather information from where the ray hits or doesn't hit, and then use this information to drive other channel values.
	Ray Type Node	When rendering an image, the first rays fired into the scene are Camera Rays. These are used to evaluate what the camera sees.
	Shader Inputs	The Shader Inputs make accessible the internal sample vector used for rendering.

Color Correct
Color Blend	The Color Blend node combines two different inputs together, resulting in a single evaluated output.
Color Gamma	The Color Gamma node changes the gamma of an input.
Color Invert	The Color Invert node reverses the incoming color values, providing a negative image type of effect.
Color Kelvin	The Channel Color Kelvin node outputs RGB values based on the Kelvin thermal dynamics color-temperature color model.
Color Correct	The Color Correct node provides an alternate method to modify the values of a color input.
Color HSV	The Channel Color HSV node outputs RGB values based on the intuitive Hue, Saturation and Value color input controls.