Well I use Smashbox primer, which is clear. And i do have a lighter olive skin, so it sucks for me.
I asked the MAC artist online, and they said that their StudioFix has alot of titanium dioxide, and to try their Studiotech because it photographs better. I ordered some online, so I will let you know how it is once it arrives. Hopefully its better.
I don't have a problem with the whiteish thing with Smashbox, BUT the coverage is alot lighter. Their liquid foundation is more like a tint.