The GLSL shaders mod is very GPU intensive, and requires a very decent computer to run it well. It is advised that the user be smart when choosing to install, and use this mod. A large amount of FPS (Frame-Rate per second) will be used in the entire process of using the mod. Thankfully, the developer of the mod has released different versions, some with different FPS usage. Even so, the mod will still undoubtedly cause a large amount of lag, this will become a large problem for those of whom do not have a computer in which can run such a mod. If you are unsure of your FPS with or without the mod installed, simply log into your world in Minecraft, and press the F3 button on your keyboard. This will bring up a screen, covered with details and lines of different information The FPS counter is located on the top left of this screen layout, easily labelled and easy to understand. To close this layout, simply press the F3 button once more.

Download: /glsl-shaders-mod/