Average deviation from the median results are shown versus θ for the direct and scattered dust emission for the effective grain approximation in the top row. The Y slice average deviation from the median results are shown versus θ for two IR wavelengths probing the dust emission in the bottom row. The results for τ_z(1 μm) = 0.1 and 0.01 are similar to those for τ_z(1 μm) = 1.0. Models not used in the precision calculation are shown as faint lines.