I was surfing the web yesterday looking up some tweaks for IV when I came across a posted topic on a particular forum site (which I don't care to go into details about which one).
I used this method and It actually worked. It does not work for some people but it was a suggestion made straight from R* themselves.
Just place any of the command lines that pertain to your texture settings and see if this helps. I hope it does anyway.
(for high texture) *This is the one I'm using and it works great.