Add "Export Shadows-ID" as an Output Option

Introducing an "Export Shadows-ID" option (maybe in Visual Settings > Output) would be invaluable for architectural visualisation.

A similar function is already available in tools like SketchUp, enabling users to isolate and export shadows alone, as shown in the attached image.

While this may seem unconventional, it provides critical utility in creative workflows, allowing precise layering and manipulation of shadows during creative post-production. This addition would fulfill a unique yet powerful need for architectural designers.