Summary of the problem FPS drop with Mekanism Energy Cube Pack Version 1.0.1 What is the bug? Noticed FPS drop when near my Mekanism auto-smelting factory (10 Machines). Eventually figured out it was the Energy cube I was using as a Buffer, once removed the FPS went back to normal, I believe it was the light animation between 99% and 100%. This is with Vanilla textures. Mod & Version Mekanism 9 Link to log file N/A Is it repeatable? yes, by placing the energy cube. Known Fix other than not using energy cubes, none that I know of.