Gas density (upper panels) and lab frame radiation energy density (lower panels) snapshots at t = 0.2, 0.3, and 0.45 (from left to right) for A122Edd1. The plotted variables are volume averaged from ϕ = 2.52 to 2.55 near the mid-ϕ plane. In the lower panel, the ray effect near the collision point is likely due to angular discretization. In each panel, the green solid line is the photosphere surface as defined in Equation (9).