TheFamilyMan
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Here is what I've found, with a tip from SteveW at avsim, about how to maximize image quality using nividia's DSR in DX10 using a gtx 780 driving full screen at 1920 x 1080 with the 344.48 driver.
The first thing is to enable the 4x DSR factor (3x is almost as good; I didn't try anything less than 3x) and set DSR smoothness to 23% (any less introduced jaggies and any more blurred texture details) in the nvidia control panel. Then if you have DX10 AA and AF settings which you currently like dialed in with NI (or nvidia control panel) and Steve's Fixer program, leave them be except get rid of using transparency supersampling AA where ever you have it enabled. No need to change any other setting anywhere, other than the screen resolution setting in FSX. When DSR is enabled, the effective factor resolution will show up in the FSX screen resolution settings and it must be selected to see the benefit of DSR. The image quality I get using these setting is stunning both inside and outside the VC; I almost fell out my chair when I flew over some high quality photo scenery. My gtx 780 hits a max usage of about 80% using these setting with dense cloud cover; with the added bonus that since SSGS AA is not used, dense cloud cover no longer hammers performance as it once did since Steve's fixer disables standard AA for clouds. In lesser cloud cover the max usage was less than 60%.
When I first tried DSR, I treated it as an AA cure all, which it's not and only got marginal results using it as such. Having AA and AF setting enabled with DSR is essential for creating jaw dropping image quality. Unfortunately lesser gcards may not get away with these settings, but for those with a 770 or better, give it a try.
The first thing is to enable the 4x DSR factor (3x is almost as good; I didn't try anything less than 3x) and set DSR smoothness to 23% (any less introduced jaggies and any more blurred texture details) in the nvidia control panel. Then if you have DX10 AA and AF settings which you currently like dialed in with NI (or nvidia control panel) and Steve's Fixer program, leave them be except get rid of using transparency supersampling AA where ever you have it enabled. No need to change any other setting anywhere, other than the screen resolution setting in FSX. When DSR is enabled, the effective factor resolution will show up in the FSX screen resolution settings and it must be selected to see the benefit of DSR. The image quality I get using these setting is stunning both inside and outside the VC; I almost fell out my chair when I flew over some high quality photo scenery. My gtx 780 hits a max usage of about 80% using these setting with dense cloud cover; with the added bonus that since SSGS AA is not used, dense cloud cover no longer hammers performance as it once did since Steve's fixer disables standard AA for clouds. In lesser cloud cover the max usage was less than 60%.
When I first tried DSR, I treated it as an AA cure all, which it's not and only got marginal results using it as such. Having AA and AF setting enabled with DSR is essential for creating jaw dropping image quality. Unfortunately lesser gcards may not get away with these settings, but for those with a 770 or better, give it a try.
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) There is some blurriness evident in some of the shots but that may be due to rapid changing of views externally. Overall though I was quite pleased with the results and the sim seemed smoother too. That was the Capt Sim B707 which is quite heavy on the frames normally I believe, I tried after with the Level D B767 and was equally impressed, then several freeware portovers. 
