I had a quick play with the Relighting feature. Very nice. That will save tons of time. Once the render completes, you can change the intensity and color for each light in the scene. The change become visible immediately in the small preview window and clicking the preview button shows it on render itself. Very fast. You can raise and lower intensities. Above is quick screen-shot of the relighting (post render options) interface with an older image with many light sources that I re-rendered for the test.

There are many changes in the layout and function of the terrain editor (and pretty much everywhere in the interface). Will take some time to get used to it. So it all makes sense and it seems that it will improve the work-flow.

Ciao
TD