Raytracing Part I

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The document discusses the history and evolution of ray tracing in computer-generated imagery, starting from its origins in 1979 with Turner Whitted's 'Compleat Angler.' It covers technical aspects including rasterization, culling techniques, reflections, and the advancements of NVIDIA's RTX architecture. Additionally, it highlights the various graphics card models and their pricing while emphasizing the permanence of ray tracing in modern graphics pipelines.

Raytracing
PART I
@jorge_magic
/in/jorgecanton

Origins
? Compleat Angler by Turner
Whitted (1979)
? First raytracing CGI
? Multi-bounce recursive ray tracing
? VAX 11/780
? Resolution 512x512
? Render Time: 74 min.

Real-time render
Rasterization Raytracing

Rasterization Cullings
Frustum culling Occlusion cullingFace culling

Rasterization Shadows
Depth Light View Scene with ShadowsComparing depths

Rasterization Shadows
Percentage Closer Filtering
Poisson Sampling
Stratified Position Sampling

Rasterization Reflections
Static Cubemaps Parallax Corrected
Cubemaps

Rasterization Reflections
Screen Space Reflections

RTX Architecture
PASCAL TURING
11.8 Billions xtors | 471 mm2 | 24 GB 10GHZ 18.6 Billions xtors | 754 mm2 | 48+48 GB 14GHZ

NVidia Graphics Cards
Quadro RTX 5000 – 2300$
Quadro RTX 6000 – 6300$
Quadro RTX 8000 – 10000$
GeForce RTX 2060 – ~400$
GeForce RTX 2070 – ~550$
GeForce RTX 2080 – ~750$
GeForce RTX 2080 Ti– ~1200$
Titan RTX – ~2800$

Raytracing has come to stay
DirectX (DXR) Vulkan 1.2 Metal (MPS)

Raytracing materials
Lambertian
Glossy
Mirror
Dielectrics

Raytracing materials
Bidirectional Reflectance Distribution Function

Raytracing Graphics Reinvented
Rasterization pipeline
Raytracing pipeline

Raytracing Bounding Volume Hierarchy
copyright haroldserrano.com

Raytracing Acceleration Structure
Top Level Acceleration Structure (TLAS)
Bottom Level Acceleration
Structure (BLAS)
Bottom Level Acceleration
Structure (BLAS)
Vertex & Index Buffers
Instance Buffer
Transform &
Properties
… … … …
…

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