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Figure 1


Fig. 1. (A) Transmittance diagrams of the gelatine filters used as the artificial landscape. (B) Sandhopper perceived radiance (SPR) expressed in arbitrary units for the blue (b), green (g), yellow (y), orange (o), light grey (lg) and medium grey (mg) gelatine filters. The filter pairs used in the experiments are also indicated. See text for further explanation of sandhopper perceived radiance.