MysteriousDev

default MINMAX will round the fRatio value to 0. The result is that effects are updated in the same rate as always.

I got interested in this topic so I tried it myself. What I've found you can pretty easily enable antialiasing on dx9.

Search for:

int CGraphicDevice::Create

Now scroll down where the parameters of ms_d3dPresentParameter are set.

Add those two lines

ms_d3dPresentParameter.MultiSampleType = D3DMULTISAMPLE_8_SAMPLES;
ms_d3dPresentParameter.MultiSampleQuality = 0;

And now that's a riddle. I haven't got too much time for a research, but ms_lpd3d->CheckDeviceMultiSampleType tells that multiSampling is indeed available, and it sets the quality to 1. But I can't get it working with it, so I left the quality set to 0, it still looks good enough, IDK what would be the difference.

Also there's one more thing to set in the parameters, and I don't know the long term effects of this change, but it looks like it works just fine, like I said I don't have too much time for doing research atm.

You'll be having a "D3DERR_INVALIDCALL" error if ms_d3dPresentParameter.Flags are set to D3DPRESENTFLAG_LOCKABLE_BACKBUFFER, and I don't know the answer for now, maybe I'm missing something, but setting the flag to 0 does the job.

After the device is created with success you must write last line to make it work:

ms_lpd3dDevice->SetRenderState(D3DRS_MULTISAMPLEANTIALIAS, TRUE);

And now you can enjoy those SMOOTH EDGES: