We’re mainly doing high quality automotive renderings with the Pathtracer in 6k or higher. There are many cases where we have to check if certain meshes/materials cause noise in our renderings. In that case it would be a huge benefit to just render out certain regions of the image to get some quicker feedback than having to render the whole image. In other render engines this feature is called something like ‘interactive render region’ I guess. Would love to see something like that in future versions of UE!
Cheers!
I am waiting for this as well!