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The diurnal course of the sun is simulated by varying the solar zenith angle from 90 degrees (horizon, left) to 0 degree (zenith) down to 90 degree (horizon, right). Shown is the radiance in an inclined viewing direction (Observer to the lower left side). The images were calculated with MYSTIC, in steps of 2 degree solar zenith angle. The image is brightest (that is, the domain-averaged radiance is highest) when the cubes are illuminated from the same side as the observer's location (left). The grainy structure is caused by the statistical noise of the Monte Carlo model. |