Export: There's an .exe in the GK directory with the aforementioned filename. The options are overlay, surface, Direct3D, DDraw and OpenGL. Are these for different compatibilities? I just had a crash that seemed to be related to graphics (on the map, something to do with a "map element" IIRC) so it'd be nice to know if there was a way for tuning it better for my ATI card.
The settings don't affect how GK itself renders its graphics, but how DOSBox outputs them, so they will not fix crashes related to the graphics in the game. If the game otherwise displays correctly (and runs smoothly), changing the graphics mode of DOSBox is not going to help you with the bug you encountered.
surface is unaccelerated output using GDI, and does not support scaling. I'm not sure what
overlay uses, but it probably must be hardware-accelerated, and it supports scaling.
ddraw uses the deprecated DirectDraw API while
direct3d uses, of course, Direct3D. For reasons unknown to me,
ddraw automatically applies a bilinear filter when scaling—a pretty strong one making the picture very blurry, so you might want to avoid that one.
direct3d doesn't filter unless you tell it to. The same would go for
opengl and
openglnb, (
nb stands for "no bilinear filtering"), but for some reason the GOG configuration tool doesn't offer the latter choice. You could set it yourself in dosbox.conf, but I'm not aware of any advantages over just using
direct3d unless you're having compatibility issues with your video drivers.
I am running Windows 7 64-bit and an ATI Radeon HD4870 card, and have never had the need to use anything other than Direct3D output.
