[Turambar]

supersampling won't work in this game.  OpenGL doesnt support it.

Trust me, i've tried every mode.

the only possible difference is that some of the combined modes use something called 'rotated grid antialiasing' for the multisampling component.

[Siegfried262]

Hmm, the "rotated grid antialiasing" must do the trick.

I've got nHancer set now to 16x ASF & 16x Q Multisampling A.A and I'm still getting a good amount of shimmering. I don't suppose there's anything else I can do, is there?

[DaBrain]

Yes, the hybrid modes still use SSAA.

They should all be using 2x1, or 2x2-OGSSAA (ordered grid). But the pure SSAA modes only work in D3D for a reason only Nvidia knows...
A guy who knows a lot about this told me the 16*S and the 32*S use SSAA for sure, but the 8*S mode might be replaced by pure multisampling.