According to the characteristics of three-dimensional films, Wincomn designers consider different viewing effects of left and right eyes; The light loss and deformation correction are considered for the large angle curved arc curtain with almost semicircle; Considering the complex environment on site and the location of the berm, the convenience of installation and maintenance is considered; Finally, with the customer's requirements and the adjustment of the project, the scheme was modified and upgraded for many times, and the best point position and installation angle of the projection were determined through the continuous improvement of the optical path simulation, so as to achieve the best visual effect.