See the row of icons at the bottom left of your Poser window .. the row of spheres? You've got it set so that Poser has to apply the actual texture map to your model in Preview mode. In real time. That's no prob for a top end video card and a 3D program with an efficient approach to displaying stuff, but Poser isn't efficient. If you select the display mode 3 from the right, you'll get nice edges and a clear view of your model, but without the texture showing all the time (except when you render). I bet you get the odd display after posing your character for a while .. Poser and your machine can't keep up, so background stuff gets ignored as it's less vital. Another trick for removing odd display errors is to minimise Poser, open a non-memory-intensive prog like Wordpad, close it, then maximise Poser again. Doesn't always work, but worth trying. And save your work often! Good luck.