This ScrSht I felt was perfect to highlight all of the changes made with this preset! It shows really well the level of change in the darkness. Notice that you can still make out things in the distance! Like the pipes, the bath tub, and the handrail on the right side. Its darker! Enough to make you not want to wander over there, but not so much that you're blind and can't make anything out. The color difference is noticeable too! Instead of being grossly oversaturated with color, I removed the green tint, by the smallest amount noticeable. Then used vibrance and colorfulness both @ 10% to add a very small amount of enhancement to the natural color of the game. Anything higher than that really just makes the game look "too" colorful, looking more fantasy less realistic. Light and shadows are also noticeable here! With the preset applied, shadows are darker and you can clearly see the additional ambience and bloom of the lights. This preset uses an additional layer of ambient occlusion. You can see how the light now travels a more reasonable distance only illuminating nearby areas, instead of the entire room being all the same level.