This is an example of some of the power of LZ. Image was made very late in the evening almost dark, on the spur of the moment, grab the camera spin the dials and manually focus it while they are there. I whistled at them to get them to look my way. Camera is D5K Nikon with probably 105/2.5 opened up pretty wide...maybe was 85/1.8 though. WB??? (doubt I had time to use the Lally cap) ISO 400 (should have went up to 800) Shutter at 1/60 which is not good etiquette really but I am into pushing the envelope that is how I roll...actually I bracketed the shot to get best exposure but I used this underexposed version to illustrate what I am trying to show you. Modified image is cropped because I just wanted to do that. Hopefully this little exercise can expand your bank of knowledge a bit. I studied the software pretty hard this past year or so and I feel I am beginning to master it. One has to work at it though it doesn't come easily.
So here is first original SOOC jpeg converted to bmp (don't even get me started on this one because it always freaks people out but it is just the method I have found to be superior for my usage)
Second image through the LightZone and GIMP