This mod will improve Medieval II: Total War with advanced HDR graphics. This should improve the overall look of the game, with little effect on graphics.
Read the readme for more details, but besides that, the essentials:
Install this to your C:\Program Files\SEGA\Medieval II Total War folder (in short, whichever folder you installed Medieval II to).
The mod can be disabled or enabled at any time ingame by using the Shift-F12 key combo.
You can tweak the mod by editing the enbseries.ini file in the main folder.
The main menu is sluggish.
Shadow quality is decreased.
This mod was NOT made by me. All credit for this brilliant piece of work must go to Boris Vorontsov. who originally developed this mod for GTA San Andreas. All I have done was tweak the settings to make it play nicely with Medieval II.