So I installed the OptiFine mod, which by itself is quite recommended to have(you can squeeze a bit more FPS on lower-end machines). This is required to run shaders in Minecraft. I then downloaded Sildur's Vibrant Shaders (Medium), and later in the screenshots(later edit: seems like the screenshots were not uploaded in the sequence I took them
) I also installed S&K Photorealism resource pack.
The result is pretty damn impressive:Click the image to see the album
This is not for low-end machines, but should work quite well on mainstream modern graphics cards. I've got an nVidia GeForce 650m on my laptop where I tested this, it's from 2012, and got between 20-25 FPS on 1600x900 resolution.