Guys, you're still on the wrong track!
As I've pointed out to Warp about half a dozen of times, it is the
/input file/ gamma handling that's broken indeed.
Your image looks washed out because the texture /is/ washed out (from
the render engine's point of view).
Convert the texture file to PNG using IC for instance (to make sure it
has a gAMA chunk, too), and you should be perfectly fine.
