Model viewer

• Model loader based on Assimp
  • Currently alpha blending will be closed as methods for identifying automatically whether a mesh needs to be alpha blended have not been found.
  • It's not guaranteed that Assimp will correctly load the skinned animations.
• Texture loader based on DirectXTex
  • Texture usage follows glTF 2.0 standard.
  • You need to offer the path of the folder which stores the textures.
  • It's not guaranteed that Assimp will correctly load the texture path.

Physically Based Shading

• These are default and the only supported PBR settings now. GUI for PBR settings is under development.
  • Subsurface Scattering BRDF: Lambertian BRDF
  • Specular BRDF:
    • Normal Distribution Function: GGX Normal Distribution Function
    • Geometry Function: Height-Correlated Masking-Shadowing Function

Deferred Shading

• Store diffuse color, emission, roughness, metalness and normal in G-Buffer

Amplification shader and mesh shader

• These are features supported by GPU with Turing or more advanced architectures.

Shader model 6.6

• HLSL Dynamic resources feature is used to simplify the root signature.

Viedo memory management

• Implemented via buddy system and segregated free lists

GPU-driven culling

• Instance culling is implemented via compute shader
• Meshlet culling is implemented via amplification shader
• Supported culling:
  • Frustum culling (instance and meshlet)
  • Normal cone backface culling (meshlet)
  • Hi-Z occlusion culling (instance and meshlet)

Cascaded Shadow Map

• With split level specified to 5 in default

Screen-Space Ambient-Occlusion

• Implemented via compute shader with 3 times edge-preserving filtering in default

Tone Mapping

• Clamp
• Reinhard
• ACES

Temporal Anti-Aliasing

• Impleted vai compute shader
• Jitter the sample position via Halton low-discrepancy sequence (from Unreal Engine 4)
• Blend current and history pixel colors in YCoCg space (from Unreal Engine 4)
• Clip the history pixel color via the bounding-box constructed by the expectation and variance of colors of the sampled neighboring pixel (from NVIDIA)

OIT

• Implemented via per-pixel linked-list and compute shader