GPU Programming and Physically Based Rendering

• Full Lighting Integrator

• Russian Roulette ray termination

• Multiple Importance Sampling

• Diffuse, reflective, and transmissive materials

• Microfacet BRDF

• Area, point, and spot lights

• Arbitrary obj mesh loading

• Full Lighting Integrator

• Diffuse, specular, and transmissive materials

• Environment lighting

• Albedo and normal mapping

• Pre computed diffusion and specular maps

• Diffuse irradiance with image-based lighting

• Specular image-based lighting

• Cook Torrance microfacet material

  • Realtime variable roughness and metallic properties

• Normal mapping & displacement mapping

# based on paper "Real Shading in Unreal Engine 4"

Visual improvements:

• Physically based depth of field

• Stochastic sampled antialiasing

• Procedural shapes and textures

Performance Improvements:

• First bounce cached intersections

• Path termination using stream compaction

• Edge avoiding filter based denoiser

• Distance-based dynamic tessellation of grass

• Natural forces sim using compute shaders

• Performance improvements with culling

  • Distance based culling

  • Orientation based culling

  • View frustum culling

• Boid simulation with cohesion, separation and alignment behavior

• Scattered Uniform Grid Optimization

• Coherent Uniform Grid Optimization