I made an interpolated IDW surface with a cell size of 500. In the symbology tab of ArcGIS, there is the "Use hillshade effect" checkbox underneath the classification area. When unchecked, my surface looks like this:
With the hillshade effect turned on, why does it look like there is a shattered-glass looking mess underneath the surface? It doesn't seem to correspond to the class breaks. What can I do to get rid of that without messing with cell size? I set the IDW surface's cell size to 500 so that the surface would look smoother/less pixelated, but the lower the cell size, the more pronounced the shattered-glass effect looks.