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The article is devoted to the problem of lightness perception. The strength of 3D simultaneous lightness contrast illusions was measured with the method of constant stimuli for thirty seven observers. The virtual reality technique was used to present stereo pairs of different 3D configurations of the illusion. The albedo-hypothesis and the coplanar ratio hypothesis were tested to explain the results. The changes of the illusion strength were consisted with the albedo hypothesis

The content of professional activity as a factor of application efficiency of virtual reality technology