Hi Oshyan.
I've yet to go into TG2 to experiment with this idea. However if you think about exposure with photography it never alone nicely fixes a high contrast between sky and ground or at least not usually. It depends where the sun is as you shoot. Many shots have other things used. First, a polarizing filter and then often some form of post.
It's just theory at the moment but I think there is a tendency to make TG2 scene to render exposed evenly but this could possibly result is dimness so I'm thinking of making a scene that has the real problems you'd have taking a photo. For example in a TG2 world, if you decide to change a shot to sunset then you'll usually have to bring the sunlight strength up. Maybe it wasn't bright enough in the first place?
Anyway here's some extreme post on a TG2 image. Sharpening done in Gimp. Probably too much but I'll eventually get a nice balance:
The original. I say original but this not like the original. It's another shoddy jpg downsize at Renderosity:
http://www.renderosity.com/mod/gallery/media/folder_157/file_1562413.jpgThere is a lot of jaggedness in my TG2 render outputs. I need to work on that.
Here is a screenshot of Lightzone with that image being post processed:
You see the selections. You've got polygon, spline and bezier to choose from. Then the inner zone is the line of where "feathering" reaches. You just drag that about as well. You can also select colours within those selection areas for more specific processing. When you go into another app it seems like a total pain in the ass. On the left you see various styles that you can save. The thumbnail shows instant feedback of the style as you hover over it. On the right in the processing stack you see a zone mapper open. The thumbnail above gives visual feedback of each zone as you move the mouse up through the zones then when you find the correct zone you just drag it. There are a lot of other tools. Relight for example which does what it says. This is of course the Linux version running in Ubuntu
It's free at present but I expect Lightcrafts will eventually charge. I bought a Mac license anyway. It's not system specific.