Composite photon spectra. Spectra are given for γ‐rays of ﹩\epsilon > 2﹩, from curvature and ICS seeded pair cascades. The curvature‐seeded runs were from our set with energy‐boosted seed photons. For the CR‐seeded spectra, ﹩\gamma _{6}﹩ refers to the primary beam Lorentz factor divided by ﹩10^{6}﹩. Normalizations are as discussed in § 4 of the text. Both the leftover seed photons and cascade‐generated synchrotron photons are added together for the spectra drawn with solid lines, while dotted lines are the spectra from higher generation synchrotron photons alone. No secondary photons are generated at these beam energies (assuming ﹩1/ \gamma _{b}﹩ beaming) in the ﹩10^{13}﹩ G case, so only the seed photons that did not produce pairs are shown. Note that the vertical axis for curvature cascades is twice the scale of the ICS cascades.