- last post: 01.01.0001 12:00 AM PDT
What are you looking at the trees for?
Heh, just kidding. Anyways...do you mean as in your computer lags visibly, or as in the tree seems to be shaky or something? Because if it seems to be shaking, then it's actually a glitch in Halo's geometry and bumpmap engines, which you can do nothing about.
If your computer is visibly lagging, though, I recommend checking to see if you have the latest drivers, and that you close any unecessary programs while playing HPC, etc etc.