I'm trying to add high resolution orthoimagery from the USGS to a mosaic dataset in arcMap. When I "Add rasters to mosaic dataset" most of the rasters load in fine, but some have strips of white area and other places are sort of grey, low contrast. I checked Update Overviews. Please see the image below as an example of the issue. Also, as you zoom in the grey/white areas go away. Any ideas?