Аннотация:The main goal of this work is to develop a fast tool for calculation of light scattered by single large optically soft spheroidal particles. In particular, such particles mimic biological cells (e.g., red blood cells (RBC)). Methodology of calculation of light scattering by arbitrarily oriented optically soft spheroidal particles in Ray-Wave Approximation (RWA) is presented. We show that RWA permits to quickly and accurately calculate the angular distributions of the intensities of light scattered from particles mimicking RBC.