I found a cool link that explains this model, and compares it to Blinn Phong shading and the Kajiya model: https://ephere.com/plugins/autodesk/max/ornatrix/docs/7/Marschner_Shader.html#Marschner-Shader
I found a cool link that explains this model, and compares it to Blinn Phong shading and the Kajiya model: https://ephere.com/plugins/autodesk/max/ornatrix/docs/7/Marschner_Shader.html#Marschner-Shader