The Coat Render Element is analogous to the Specular Render Element with the main difference being that all Coat render elements can be subtracted from the main back-to-beauty composite, graded, and added back in.

The Coat Render Element isolates the reflected light in the scene. This render element is an image that stores specular reflection (highlight) information calculated from the material's reflection value in the scene. Specular reflection is defined as the reflection of light from a surface in a single particular reflection, as opposed to a diffuse reflection which is reflected at many angles.

The brighter the area, the more highlight reflection the object exhibits in the render. Specular highlights are colored if the Reflection Color parameter of a material is colored.

The parameters for this render channel appear in the Parameters tab under the out Network and within the render elements node.

Name – The text added to the end of the rendered file, when saved as a separate file.

Color Mapping – Applies the color mapping options specified in the Color mapping tab of the V-Ray Renderer to this render element.

Consider For AA – When enabled, antialiasing is considered where possible.

Filtering – Applies the image filter to this channel. Image filter settings are in the AA sub-tab of the Sampler tab of the V-Ray Renderer node.

Derive RAW Channels – Generates data in the raw channels by combining the respective color and the filter color channels.

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

Deep Output – Specifies whether to include this render element in deep images.