Mike - That's correct. The curve being applied did a very good job of making dark areas a little brighter - and that part can be replicated pretty easily. What it did well was managing the rest of the scene so that bright areas remained unchanged. I had some blue sky filtering through branches in my test images and it was very hard to recover the dark shadows while maintaining the correct exposure for the sky when there was so much detail. A simply blue sky would have been easy, but the software did a good job with applying a curve or curves to a complex scene - and that was very hard to recreate.