RealEngine

My toy engine, mainly for rendering experiment and prototyping. It requires a GPU which supports DX12 Ultimate with latest driver. It is not supposed to be used in production, and prefers clean design and code over being heavily optimized.

some highlights

• utilize latest DX12 features, such as raytracing, mesh shaders, HLSL 2021, etc.
• render graph based architecture, with automatically barriers and transient resources management
• fully bindless resources with SM6.6
• two-phase occlusion culling (like Ubi's GPU driven pipeline). no matter how many different meshes and textures, always two drawcalls(indirect DispatchMesh) per PSO.
• hybrid rendering with raytracing
• Print, DrawLine functions in shaders which can be very useful for debugging

planned features

• [x] render graph(barriers, resource aliasing, async compute)
• [x] GTAO
• [x] specular GI
• [x] diffuse GI
• [ ] clustered shading
• [x] Bloom
• [x] Auto Exposure
• [x] TAA
• [x] CAS
• [x] meshlet
• [x] RTX
• [x] a reference pathtracer
• [x] FSR2/DLSS/XeSS
• [ ] DOF
• [x] motion blur
• [ ] visibility buffer
• [ ] Direct Storage
• [ ] maybe volumetric cloud/fog, water/ocean simulation, large-scale landscape, or any random things

AMD related issues

tested on RX6600(win11, Adrenalin 22.10.01.03)

• using SV_IsFrontFace in an AS-MS-PS combine results in DXGI_ERROR_DRIVER_INTERNAL_ERROR when creating the PSO

  D3D12: Removing Device.
  D3D12 WARNING: ID3D12Device::RemoveDevice: Device removal has been triggered for the following reason (DXGI_ERROR_DRIVER_INTERNAL_ERROR: There is strong evidence that the driver has performed an undefined operation; but it may be because the application performed an illegal or undefined operation to begin with.). [ EXECUTION WARNING #233: DEVICE_REMOVAL_PROCESS_POSSIBLY_AT_FAULT]
  

• denoiser_reproject.hlsl compiled with -O0 crashes when creating the PSO
• HSR - raytrace pass with async compute results in GPU hang

third party licenses

• DLSS
• XeSS
• NRD