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One of the most important things to understand IMO with this higher dynamic range rendering - whether filmic, ACES or whatever - is that correct PBR based materials and lighting are key components as well. Not enough emphasis is given to that. 'White' needs to have a diffuse value of around 80% for typical surfaces. With that you'll be able to pump up your lighting to more realistic 'sunlight' levels - and therefore get better GI and overall more realistic light interaction. Eg: One dome light, one box with a realistic window sized hole... straight out of the renderer: I can certainly remember the days when we couldn't even imagine getting a result straight out of the renderer like this. So, whether you choose to use Blender + filmic, or ACES, or whatever - rejoice and be happy : )

Perspective is the key to this gadget. The parabolas are tilted slightly - this is from the side, but others are also tilted. To get the angle, I made an XPresso rig and eyeballed it. look through the camera in this scene and move the slider sq circle.c4d original -

Finally - just this week - I got some space and time and did it... I've spent a week learning, testing and developing - and have now completely revised my workflow to an ACES based one - from rendering through compositing. It's not been easy, but I think it will be worth it. I've just completed the first job on the new workflow and it's gone well. Unfortunately it's under strict NDA, so I can't share the images. Hopefully I might have some I can share in the future. If you want to get better output and much more post-render compositing flexibility I'd certainly give it some serious thought.