This element works as a reverse mask for shadows. It is a color image that can be used to lighten, darken or tint shadows. Shadows can be lightened in the composite by adding this render element, or darkened by subtracting this render pass from the final composite.

Denoise – Specifies whether to denoise this render element.

The Shadows Render Element is useful for changing the appearance of shadowed areas in a compositing or image editing application. In the example the Shadows RE is subtracted from the Beauty element, resulting in a darker render.