This shaderpack is unique among my packs for a variety of reasons. It tries to stay really close to what vanilla Minecraft provides in terms of graphics, thus it keeps the original vanilla clouds as well as the vanilla lightmap. However, while sticking to the "minecrafty look", it also gives it some visual touchups like dynamic shadows, better fog and some slightly improved lighting of the vanilla clouds, making them look more integrated into the world. All this comes at a very little performance cost (given that you are not CPU limited without shaderpacks already), making it a nice touchup that is definitly worth the shot. It goes very well with the Bare Bones Resourcepack.