I've been ranting about getting tone mapping updated in Corona for ages as I've believe it's a hugely overlooked part of the rendering equation (inb4 "but you can just use photoshop/something about the VFX industry").
Oh yeah, it's the same here as well. I would rather have a button that says "render linear" or something like that, to fulfill the demands of the oldschool VFX and post guys, but straight out of the box Corona and V-Ray should render as close to a camera as possible. I believe there was a whole thread dedicated to that topic here on the forums, I don't know where it has gone to.
I still feel a LUT made from fStorm renders could help however, if that is possible.
Also, fStorm has that feeling to it's renders that Maxwell render had in the Alpha stage. When the release candidate for Maxwell was around, they changed color mapping in order to make it work with render elements or something, but in turn the output was less realistic. I still have some renders from the alpha on my disk that look similar to fStorm nowadays.