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This page gives some basic details about the Refraction Filter Render Element and how it is used in compositing.

 

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Overview

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The Refraction Filter Render Element is an image that stores refraction information calculated from the materials' refraction values in the scene. Materials with no refraction values appear as black, while refractive materials appear as white (maximum refraction) or gray (lesser amounts of refraction). If any hue (color) is specified in the material's Refractive Color parameter, that hue and value will be represented here in the Refraction Filter as well as being affected by the refraction's Amount parameter.

In comparison, the Raw Refraction Render Element is a color render element that takes materials and their colors into account when rendering refraction. Multiplying these two render elements together produces the Refraction Render Element.

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To properly calculate the Refraction Filter Render Element, the Refraction Render Element must also be added to the list of render elements being calculated during the rendering process to properly determine all the refraction information in the scene.

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The parameters for this render element appear in the V-Ray RenderChannelColor render channels node.

 

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Denoise – Enables the render element's denoising, provided the Denoiser render element is present.

Consider for Anti-Aliasing – When enabled, anti-aliasing will be used where possible.

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