The obvious place to start seems to be to determine which program are you messing up with: ENVI or ArcGIS? One way to answer that question might be to try to open the tiff file you made in a third program (say, Photoshop) and see if the tiff file looks correct there. If it does, you are probably having an issue with ArcGIS. If it doesn't, you probably need to look at how you're saving your tiff file out in ENVI. And if you want help with that, you should probably tell us as much detail as you can about how you're saving the tiff file in ENVI :) Jeff