For my graduate-level graphics course CIS 4610: Advanced Rendering,  I implemented an OpenGL Shader that handles a microfacet BSDF material model with metallic/plastic BRDFs and pre-computed diffuse/glossy irradiance. 

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My responsibilities included: 

• Microfacet BSDF

  • Implemented microfacet material via a weighted average of the Cook-Torrance BRDF (used for glossy reflection) and Lambertian BRDF (used for diffuse reflection).​

• Diffuse Irradiance

  • Precomputed a diffuse irradiance map by taking samples of an environment cube map across the set of directions within the hemisphere aligned with the input surface normal .

• Glossy Irradiance

  • Precomputed a glossy irradiance map by taking samples of an environment cube map via importance sampling based on the GGX normal distribution function. ​

• Normal and Displacement Mapping​​