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Fig. 4

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Results of test 2. Logarithm of optical depth τ for the second (non-monotonic, spherically symmetric) analytic test, as obtained with four methods: a) analytic solution (see Eq. (13)and Fig. 2d); b) tree MODA; c) grid MODA; d) local RbR. Contour lines correspond to log τ = −1,0,1.

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