When i was playing penumbra from downloaded from:
http://frictionalgames.com/penumbra/
graphic looks phenomenal. Shading looks good. Game is dark, and flashlite look usable, FPS is good. Light effects are good.
But when i installed Overture Episode One.
Game is not so dark, FPS is lower, flashlite effects look very bad, glowstick effects look very bad, sometimes i have flashlite on and its all dark anyway, there is some ugly lighning as it is cubic. Some objects near me are almost 100% dark black. And Flashlite and glowstick effects are weird with lot near and far objects staying black. Some far objects turn suddenly from black to visible when i come closer.
I have Pentium 4 3.2 Ghz 512 RAM, ATI Mobility Radeon 9200
What could be problem. Penumbra look good, but Overture look bad. I could add screenshot if its needed.