well you could try upping the resolution...
remember when you render things in your 3d programs your using FSAA and not a optimised game version but an optimised quality version.
Essentically blending all of the object external edges with the textures and background (kinda like a traced blur)
this is highly processor intensive (unless like myself you have a card which has a specific driver to enhance the speed of this)
currently my own efforts to add FSAA to DBP have failed as you can't seem to access DBP's DeviceDriver to update it, you can recreate the device as many times as you like but updating its setting just doesn't work.
i think i know what i have to do for it, but right now i doubt many people would want it for it to be worth the effort.
really you'll just have to put up with it at low resolutions, but surely you've played enough games to already know this?