This is my first post here, so the first thing I would like to say is that I can’t keep up with all the improvements and new features you are adding to Blender. So first of, thank you for the fantastic work!
We started a discussion about the current rendering interface, and a first version of a new render window. The interest and involvement by the community has been great, see the feedback here: https://youtu.be/QSmAqR2XJvc
I’m also surprised that this haven’t gotten much attention by developers. Now isn’t the best time to bring this up because of holidays, but the proposition has many improvements that should be added in Blender and hopefully will be noticed.
This add-on speeds up previewing renders by tracking and only rendering objects that move. It saves rendering time by not rendering parts of the image that don’t change.
The main purpose of this add-on is to allow the border render feature of blender to be able to update its location and size every frame to always encompass the selected object or group (mesh objects only for the minute). This can be useful when wanting to render an animated object at final quality, but not render any of the surrounding areas, so as to preview it or to skip rendering transparent areas of the image (which can happen if an object is on it’s own renderlayer).
I tend to think that features from this add-on should be part of Blender by default.