Penumbra overture runs slow

[janosik]

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Because of that and the dynamic lighting/shadows a high end video card is required to do a higher resolution.
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any ideas what would a high end card in this case be? i.e. well enough supported linux card that would run penumbra in 1280x1024 resolution, it's hard to figure out how well the given card runs under linux (each of them seems to have different gotchas not mentioned (or not explained well) in reviews)

erik