As promised, DreamCatcher Games has released
the third Painkiller singleplayer demo. This new demo includes the "Military Base" level, and comes with an updated version of the PAIN engine used in the expansion pack Battle out of Hell.
In the popular "Military Base" level, players will enjoy effects such as heat and haze distortion, light blooms, per pixel specular mapping, new shader effects and tweaks for the latest video cards
You can find some comparison screenshots of these new effects
right here.