With the 81.89/81.94 drivers something has changed. When you first load a map, the picmip tweak isn't that needed. When i hit . to run it now, i gain maybe 1-2fps, that's all.
However, if you alt-tab out and back into game, fps drops by ~25% back to the level of previous drivers. Hitting . to run the picmip tweak restores performance again.
So in short, the picmip tweak doesn't really improve things a lot anymore, maybe 2-3%, but if you alt-tab out of COD2 at all, you will still need it.
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