PixHt-Lab: Pixel Height Based Light Effect Generation for Image Compositing

a) cutout (b) SSN [48] (c) SSG [47] (d) PixHt-Lab (ours) Figure 1. PixHt-Lab renders realistic reflection and soft shadows on general shadow receivers for 2D cutouts. (a) shows the object cutout and composition background. (b) SSN [48] cannot render soft shadows on walls due to its ground plane assumption. (c) SSG [47] renders specular reflection, but the shadow on the wall is uniformly softened. (d) Our PixHt-Lab renders realistic soft shadows on the wall guided by 3D-aware buffer channels. The shadow is softened according to the background geometry with more realistic details. PixHt-Lab also renders realistic reflections with physically-based surface materials.