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The Refraction Render Element stores refraction information calculated from materials – such as glass or water – that refract objects behind them in the camera's view. This means the brightness, coloration, etc., of the refractions can be adjusted without the need to re-render.

Any material in a scene with a value set for its Refraction parameter generates refraction information that can be seen in this render channel. A surface with no refraction values set in its material(s) contains no information in the render element and, therefore, renders black.

The Refraction Render Element is a key component in the main Beauty Element and can easily be used to control the refractions in the Beauty composite.

The Refraction Render Element itself is already a composite of the V-Ray Raw Refraction Render Element multiplied by the V-Ray Refraction Filter Render Element. When finer control over refractions is needed in the composite, add these additional two channels to the output along with the V-Ray Refraction Render Element.

This render element can be used to enhance the refractions of a scene after the render is complete. See the example.

UI Path: ||V-Ray|| > Render Elements > Refraction

(How to add a render element to a scene)

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