Maximum energy ﹩{E}_{{\rm{\max }}}﹩ as a function of the obliquity, shown as ﹩\cos \theta ﹩. Curves are computed from Equation (5) using the diffusion coefficients in Equation (4) at fixed shock and environmental parameters (see Section 3.1.2). As η increases, diffusion becomes strongly anisotropic and ﹩{E}_{{\rm{\max }}}﹩ rises toward more perpendicular shocks, reflecting faster acceleration due to reduced effective cross-field transport; in the limit η ≪ 1 the angle dependence weakens and the curves flatten.