OK, so I came back from work and took a look at the website, everything looks fine on my monitor, even with messing around with brightness/contrast.
Since I can't see what's wrong with the site images from my home, I made few Photoshop export variations and I'm putting them online so I can see the results tomorrow at my work on that crazy monitor.
If you guys can also take a look at the variations and tell me which screenshots are messed up and which are fine. There should be at least ONE version that has addons that seamlessly merge with the original backgrounds:
#1 Current site: png addons + png screengrabs from Fraps (raw png, no export)
#2 Very first site: png addons + jpg screenshots (print screen or scummRevisited copy, Photoshop new, paste, each exported as jpg directly from PS using 'save for web')
#3 Yesterdays messed-up site: png addons + jpg screengrabs from Fraps (captured as png, batch export as jpg from Adobe Bridge via Adobe Photoshop)
#4 New candidate: png addons + jpg screengrabs from Fraps (captured as png, each exported as jpg directly from PS using 'save for web')
Either Fraps or Bridge's 'batch export' messed things up, I'm hoping the 'save for web' will fix things. Let me know, I'll take a look tomorrow.
P.S. I just manually forced AntiAliasing in Residual via nVidia control panel. Is this a normal way to do this, doesn't Residual have native AA support?
P.P.S. Forced AA via nVidia control panel doesn't make Fraps screenshots better. They are still without AA... I've really spent too much time on screenshots and website instead of working on the backgrounds. Just let me know guys about those image variations I've posted above.