Component:LUT Material

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Component image 

LUT Material component as seen in the Scene Inspector

An LUT or Lookup Table is a way of mapping input values to output values via sampling a 3D Texture. This 3D table of values allows for any arbitrary function to be applied to an input.

How the sampling works is that it takes a color behind it (for example, a magenta color) and maps it's RGB values to a 0-1 Float3 as XYZ, it then samples the provided 3D texture at point XYZ multipled by the texture's size, and uses the pixel's color as the result which is applied to what the user sees through this material.

For more info on how pixels are arranged on a 3D texture and can be retrieved using an Int3, see 3D Texture.

Fields

Fields

Name	Type	Description
persistent	Bool	Determines whether or not this item will be saved to the server.
UpdateOrder	Int	Controls the order in which this component is updated.
Enabled	Bool	Controls whether or not this component is enabled.
HighPriorityIntegration	Bool	If true, integrating this asset (e.g. processing procedural assets) gets higher priority than assets with this flag off. An example is user laser procedural meshes.
Rect	Rect
RectClip	Bool
ColorMask	ColorMask	The color channels to affect
StencilComparison	StencilComparison	See Type:StencilComparison for an in depth explanation on what this does.
StencilOperation	StencilOperation	See Type:StencilOperation for an in depth explanation on what this does.
StencilID	Byte	The Stencil ID of this material. This is sometimes written to the frame buffer's Stencil mask, or used to determine whether this material should render for a particular pixel.
StencilWriteMask	Byte	does a Bitwise AND with this number for every pixel in the frame buffer this is rendering on top of when this object is drawn, after reading from the buffer.
StencilReadMask	Byte	is bitwise ANDed with the Stencil in the frame buffer before the test compares them.
RenderQueue	Int	changes at which point a material renders on the render stack
_shader	Shader	Internal.
LUT	Texture3D	The 3D texture to use as a lookup table
SecondaryLUT	Texture3D	A secondary 3D texture to use to lerp between
UseSRGB	Bool
Lerp	Float	Allows blending from the first LUT (0) or the secondary LUT (1)
BlendMode	BlendMode	How to blend this material's colors vs what it rendered on top of.
Sidedness	Sidedness	Render on both sides of the mesh, front, or back.
ZWrite	ZWrite	whether this material should respect the distance it is from the camera.
ZTest	ZTest	Determines whether this object should render when it is in front of or behind other objects that respect depth from the camera

Usage

The mapping function of an LUT takes an input RGB value and then samples the 3D Texture at that corresponding coordinate to find the output RGB value, using the 3D Texture's Filter Mode and Wrap Mode to resolve how intermediate values work.