Am encountering an fsx weather related problem with UTXAK scenery.  My scenery shows up with mulitiple haze contour lines which slice off mountain tops and other irritating stuff.  I've been told it's a semi permanent visibility layer bug and who knows the cure?  When I selected an Orbx weather theme, which came with FTXPNW, the lines disappeared.  Rex, I thought was my primary weather engine and overrode all things FSX - no such luck.