Oren-Nayar Diffuse Model + Blinn Specular Model

The default Diffuse Model in Unreal is Lambertian, wich is quite poor and dull. Here is my improvement with Oren-Nayar diffuse model:

Lambertian Diffuse model + Blinn Specular Model:




Oren-Nayar Diffuse model + Blinn Specular Model: