Currently we ship the game with OpenGL and DirextX 9 support. Ogre 1.8 will also have DirectX11 support (no official DX 10 support however as it seems).
So the question is: What systems should we offer/ship with the game? Stay with these two? Remove DX support completly?
Personally I'd vote for OpenGL-only. This is supported by all operating systems and by all graphic cards/drivers from the last 5 years (at least). This also ensures that the game looks the same on all platforms (DX9 looks slightly different then OpenGL). Another advantage is the reduced amount of DLL files and smaller installer package on Windows.
I'm not sure, but I have the feeling that on my system the OpenGL renderer needs less CPU power compared to the DX9 one. So this could be an argument for OpenGL-only, too.
Any opinions on this?