Ray-traced images of the CN emission rings in models with 10^-2M_⊙, ψ = 0.3, h_c = 0.1 disks around a T Tauri and a Herbig star. The ring in the Herbig disk is clearly more extended than that around the T Tauri star. The images are not convolved with any beam, and the resolution is set by the size of the cells in the spatial gridding of the disk (~2.5 AU). For the ray-tracing, the disks are assumed to be at a distance of 150 pc.