This page gives some basic details about the Raw Refraction Filter Render Element and how it is used in compositing.
The Raw Refraction Filter Render Element is similar to the Refraction Filter Render Element, except it is not affected by Fresnel falloff. The result is a solid mask showing the areas of refraction.
To properly calculate the Raw 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.
||Render Settings window|| > Render Elements tab > Raw Refraction Filter
The parameters for this render element appear in the Attribute Editor under Extra V-Ray Attributes.
Enabled – When enabled, the render element appears in the V-Ray Virtual Frame Buffer.
Deep output – Specifies whether to include this render element in deep images.
Filename suffix – The text added to the end of the rendered file, when saved as a separate file (e.g. myrender.rawRefractionFilter.vrimg).
Denoise – Enables the render element's denoising, provided the Denoiser render element is present.
The Raw Refraction Filter Render Element is useful when a precise mask is needed for refractive objects. Unlike the Refraction Filter Render Element, there is no need to clip or readjust values when pure black or white is required for the composite.
- To properly calculate the refraction information in the Raw Refraction Filter, Refraction Filter, and Raw Refraction Render Elements, the Refraction Render Element must also be rendered at the same time, even if it's not going to be used in the compositing process. Doing so enables all the refraction information to be included in the rendering calculations.