Hi!
When Shade was recommended as a replacement for or an addition to the EnbSeries mod I was more than happy because Enb had never been totally stable on my machine (probably due to the FSX.CFG highmem switch).
However, even with the Ambient cloud lighting tweak (http://aussiex.org/f...lighting-tweak/) Shade had never been able to fully reproduce similar effects...at least until the FXAA tool was released. I have been fiddling around with the FXAA settings for quite some time now and this is a collection of screenshots above FTX EU ENG/Aerosoft London for comparison.
I guess you can reproduce almost similar effects with FXAA only. Yet Shade's Ambicloud tweak will add even more realism. I have disabled all FXAA functions except for Bloom and Tonemap. Framerates are not affected by the tweak, at least on my machine.
IMHO Shade + FXAA create even more realistic FSX lighting than the EnbSeries although they work quite differently. See for yourself and enjoy!