this is a GOD zone and this issue has been mentioned before. A fix for it is located here so try this
http://www.eqemulator.net/forums/showthread.php?t=21010 post #13.
i'll take the work out of it hehe.
Goto your eqclient.ini and add the line HardwareTNL=False to your eqclient.ini file somewhere under [Defaults]. Save it and go check it should fix the texture problem. It fixed mine and the ones posted in the thread i justed linked to.