Some general biochemistry textbooks also have helpful figures. For example Geoffrey Zubay, Biochemistry, 4th edition, Figure 5.45, p. 109, shows a contour representation of electron density at four resolutions. Also, Berg's updating of Streyer's textbook has a nice use of the diffraction pattern of the Parthenon, and two reconstructions of the Parthenon from this diffraction pattern, one at low and one at high resolution.