Weeell, OK - don't get me wrong - I love Gish but gameplay-wise this looks EXACTLY like the old title... I don't want another game that is exactly like the first one - Gish was wonderful because it (he) was original.
Well, Endurion - dont'cha think that it's time to change your graphics card? If Gish 1 didn't run well (dynamic lighting I guess) then Gish 2 won't run well either and I don't see a reason why it should... The version numbers of graphics cards have meanwhile almost doubled and their performance quadrupled or sth. It's not even as if a new(er) card was expensive... All I know is that Gish ran perfectly smooth on my GF6800GT I had at that time.
Isn't the processor mostly to blame if the game runs slowly? I'm not very familiar with video cards and their programming, but I would assume that hefty calculations like physics and dynamic lighting are done by the CPU rather than the GPU. (But please, correct me if I'm wrong)
Yeah, well - Endurion only said something about his GPU so I assume he met the processor specs. =)
Besides - Gish is 2D but it does have dynamic lighting which could slow down the game if you had a slow GPU... Hmm... A really, really slow GPU - slower than GF5500 for sure...
A AMD Sempron with 2800 MHZ (effectively 2 GHz) ought to be enough i think :) At least more than the constant 1 fps i get.
It's definetively something they do with OpenGL, i had that effect on ONE other game which was a Ludum Dare entry. Something with the stencil buffer i reckon.