The image above was rendered with a sphere with the petrified barnacles texture preset, a spherical light, and the sky/sunlight/etc. disabled. In the area outside the red box the texture was unaltered from the preset, and you can see a sharp line between the lit and shadowed area. When the bump is removed (as in the area inside the red box) the division becomes gradual. Has anyone else encountered this problem and discovered workarounds for it other than removing the bump?