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A new model of laser light scattering was obtained from experimental profilometer data and ray casting technique. Modelling was based on variables common to an angle resolved scatterometer and geometric optics. With this model, it was possible to obtain the scattering patterns, masking and shadowing effects, multiple lobes and backscattering. As advantage of the model, it was unnecessary to make statistical assumptions about the slope distributions. Satisfactory results were obtained from verydoi:10.5897/ijps11.743 fatcat:nzdfkg6huzgzvbawcviin2c5rm