An introduction to shader derivative functions

• explanation of partial derivates in pixels shader, (ddx, ddy in HLSL or dFdx, dFdy in OpenGL)
• the rate of change for variables in a 2x2 pixel grid
• how they are calculated, how they can be used to calculate face normals from world space positions
• how branches interact with derivative calculations

More compute shaders

• explanation of SIMD execution details for GCN
• discussing latency, throughput, and scheduling
• introduction of instructions that allow multiple SIMD lanes to exchange information
• extra requirements for pixel shaders

Rotating a vector using integer math

• a technique to rotate vectors on the GPU using only integer math
• aims to take advantage of packed operations and scalar integer operations

Gathering Feedback: Open Problems in Real-Time Raytracing

• Colin Barré-Brisebois is looking for feedback and open problems in real time raytracing
• this will influence the HPG 2018 keynote

bezier bounding box

• how to calculate the bounding box for quadratic and cubic Bezier splines analytically

The Team Color Problem

• changing the color parts of a character at runtime using a mask texture
• detailed visual explanation of why this works for fixed colors but causes an issue when giving the option to blend between two colors
• using premultiplied colors removes the artifacts

Blending an HDR color into a U8 Buffer

• explanation of how blending HDR values into an SDR render target behaves regarding clipping into the [0,1] range
• shows how using non-premultiplied HDR values results in incorrect results and how this can be fixed by the use of premultiplied alpha colors

Writing a Modern Metal App from Scratch: Part 1

• tutorial how to write a Metal app for iOS
• end results is a spinning, constant color teapot
• deals with loading models, handling vertex data, shaders, constants and drawing

Shader Showcase Saturday #1

• showcase of small rendering demos that showcase volumetric rendering effects

Dark and Stormy

• explanation of dark and stormy, cloudy skybox shader for unity
• source code and example assets are available

QuadriFlow: A Scalable and Robust Method for Quadrangulation

• a technique to generate quadrilateral meshes from triangulated meshes
• won the Best Paper Award at Symposium on Geometry Processing 2018
• source code available

Low Level Graphics Library (LLGL)

• a library that aims to provide a thin abstraction layer on top of OpenGL, D3D11, D3D12, Vulkan, and Metal

Rudimentary temporal anti-aliasing solution

• GLSL implementation as a starting point for a temporal antialiasing solution

Real-Time Rendering, 4th Edition Bibliography

• bibliography of the Real-Time Rendering 4th edition
• 1978 references