What is the issue that you guys are still having? There’s a lot of talk here that isn’t directly correlated to “4.19 physical lights” and I don’t want to go through 8 pages again.
I recently did a relighting scene with physical units(cd/m² for emissives/sky and Lumens for lights) and it felt pretty good. Like my first tests with the system, I avoided auto-exposure, so I can’t speak on that. Although, a quick test with the Basic Auto Exposure with the Constant Calibration(amazing feature btw, simplifies exposure tweaking drastically) proved to be just as useful with all physical values than it was without them. I usually have Pre-Exposure enabled as well. Otherwise EV100 has been working pretty well.