Left 4 Dead

Version and / or Patch Used: Latest Steam Update

Timedemo or Level Used: Custom Timedemo

Developer Homepage: http://www.valvesoftware.com/

Product Homepage: http://www.l4d.com/

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Left 4 Dead uses the latest version of Valve's Source engine, with improvements such as multi-core processor support and physics-based animation to more realistically portray hair and clothing, and to improve physics interaction with enemies when shot or shoved in different body parts. Animation was also improved to allow characters to lean realistically when moving in curved paths.

Rendering and artificial intelligence were scaled up to allow for greater number of enemies who can navigate the world in better ways, such as climbing, jumping or breaking obstacles. Lighting has been enhanced with new self-shadowing normal mapping and advanced shadow rendering that is important to convey information about the environment and player actions.

Under Left 4 Dead we can see that we hit a bit of a brick wall around the 100 - 110 FPS mark when moving to SLI and Tri-SLI.