Years of internal research and development have led to a major breakthrough for rendering clouds with photo-realistic shading. Terragen 4 can simulate light scattering hundreds of times within clouds to produce their characteristic softness, as well as inter-cloud and cloud-surface interactions. Along with new simple-to-use presets that realize a variety of common cloud types such as altocumulus, the new cloud shading technology allows you to produce highly realistic skies with ease.