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Compositing Material Nodes Reference

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To make compositing easier, we've added a series of nodes to serve some of the most common compositing operations. Here, we briefly highlight each one, and explain its purpose.

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The compositing material nodes expect a float4 input, so make sure you’re passing in RGBA and not just RGB.

Over

This node layers one image (A) over another (B), using the alpha from input A.

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This node expects that the input color channels are pre-multiplied with the image’s alpha.

In

This node returns the portion of A that is inside the shape of B.

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Out

This node returns the portion of A that is outside the shape of B.

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PreMult

This node multiplies the input's RGBA channel by its alpha.

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UnPreMult

This node divides the input's RGBA channel by its alpha.

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KeyMix

This node layers two images together using a specified mask.

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