Graphics Programming weekly - Issue 319 - December 24th, 2023

Mesh Shaders on RDNA™ Graphics Cards

  • the blog post is the beginning of a series covering mesh shaders and how they map to the RDNA hardware
  • explains the classical pipeline and how the mesh shading pipeline differs
  • presents which AMD hardware stages are used to implement the stages
  • additional presents how amplification shaders can be used to represent dynamic workloads

Occupancy explained

  • the article provides an in-depth look at understanding shader occupancy on RDNA hardware
  • shows what occupancy is, what factors could limit it, and how to observe the actual occupancy
  • presents how to improve occupancy
  • additionally, it presents pointers to detect cases when more occupancy might not be beneficial

Optimizing Shaders in Unreal Engine

  • the article presents techniques to help identify the performance cost of shaders created from unreal shader graphs
  • shows how to see the generated instructions
  • additionally, it presents a couple of examples to optimize the generated shaders

Interpolation Using Wave Intrinsics

  • the article presents a shader function that uses wave intrinsic to calculate interpolation of the result of lane-dependent calculations across lanes
  • shows step-by-step how the shader is structured
  • additionally presents how to take advantage of SPIR-V inline to further improve the generated code

An update to our Render Graph

  • the article provides an overview of the implementation of a render graph implementation
  • presents how the implementation uses versioned resources to structure the order of render passes
  • shows how the execution order of the render graph is established
  • additionally, it discusses how unused render passes are removed

Vulkan Video Decode: First Frames

  • the blog discusses the implementation of Vulkan video decoding to get the first frame of a video
  • shows the steps necessary, from loading a file to unpacking the mp4 to actually decoding a first frame
  • discusses pitfalls encountered along the way
  • additionally, it presents a collection of other resources used to get to the stage

Surface Gradient Bump Mapping Framework Overview

  • the paper presents a retelling of the Surface Gradient Bump Mapping Framework paper from the author’s perspective
  • shows what normal maps are, how they encode information, and what the difference between object and tangent space is
  • discusses issues with blending normals from different sources and how the alternative representation can achieve better-blending results

Ray tracing animated crowds

  • the blog post discusses how GPU-based animation for large crowds is implemented
  • presents how the animations are structured, driven on the GPU, and acceleration structures for ray-tracing are generated
  • additionally presents how skeleton instancing can be used to reduce animation costs while still allowing object variations

[video] Digital Foundry's Best Game Graphics of 2023 - PC, PS5, Xbox, Switch - Another Amazing Year

  • year-end video that discusses the standout graphical games of the year
  • presents demonstrations of the effects of the game-nominated
  • shows the top 3 picks for best-looking games of the year and presents the reasoning for the choices

Thanks to Lesley Lai for support of this series.

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