2017 Copyright held by the owner/author(s). In this work, we present an integrated model that can provide direct illumination, subsurface scattering and soft shadow effects in a single equation. We have implemented our model to render basreliefs, which are the shapes that are defined as height fields. Using our model it is possible to interactively obtain all three effects in a qualitatively consistent way. One of the most important properties of our model is that it provides cos ? for planar surfaces. Moreover, our formula is qualitatively related to exponential attenuation due to scattering and provides soft shadows. Therefore, this model provides qualitatively consistent shading for direct illuminated subsurface scattering and shadow regions.
