Stereographic view of the 3D dust map integrated between 300 and 500 pc (in blue) and the total gas column density (N_H, in green) toward the Orion-Taurus ridge, shown with white contours. Light-blue contours trace the 3D dust map at A_V = 2, 3, 4, 5 mag. The N_H map is shown above 10²¹ cm⁻². The coordinate grid and the white contours are the same as in Fig. 1. The long-dashed yellow line indicates the edge of the OES. The short-dashed-yellow line indicates the edge of the Orion shell reported by Foley et al. (2023). A white circle highlights the center of the OES.