title says it all. whats the best mods for these games and how much resources do they take.
XZero's Global Ambient Lighting / POM AF
Silent's High Res Foliage
Xigmatek's particle mod is pretty cool sometimes, but it kills my framerate when using incendiary ammo. The above are all great, and I haven't noticed much (if any) performance loss compared to vanilla.
Another one worth trying is the Advanced AI mod. This one locks me up every now and then, however. It's not perfect, but it makes another playthrough interesting. Enemies are more aware, use cover more, prone, etc. It definitely increases the difficulty - which IMO is a good thing.
Haven't tried any mods for Metro. The only ones I've heard of I have no interest in (unlimited ammo, god-mode....stuff like that).