Final state of three identical, Moon-forming simulations that showcase the effect of different resolutions on model results. Impact conditions are as in Figure 1: θ_coll = 45^∘, v_coll/v_esc = 1, and T_surf ≈ 2000 K. From left to right, simulations increase in resolution from 10⁵ (left) to 10⁶ (right). Major differences are apparent between 10⁵ and 5 × 10⁵ particles, including the formation of an intact satellite. Results appear to converge at 5 × 10⁵ particles. The increase from 5 × 10⁵ to 10⁶ does not change impact outcome and results in minimal changes (∼0.23%) to the mass of the final satellite. As in Figure 5, colors represent material and origin body: blue for target’s mantle, purple for impactor’s mantle, red for target’s iron core, and yellow for impactor’s core.