afuzzyllama/UnityRayTracingPlugin

Native plugin for Unity3d that replaces the renderer with a hardware accelerated ray tracer.

Unity Ray Tracing Plugin

Proof of concept native plugin for Unity3d that replaces the renderer with a hardware accelerated ray tracer implemented with Vulkan.

Tested on RTX 2080 with NVIDIA Vulkan Beta drivers installed (457.67).

Builds with Vulkan SDK version 1.2.162.1

Usage

• Point to this repository to install as a package in a Unity project

• In Unity

  • Set the Graphics API to Vulkan under Project Settings => Player
  • Create a Ray Tracing Render Pipeline under Pixels for Glory => Ray Tracing
  • Set created asset to Scriptable Render Pipeline Settings under Project Settings => Graphics
  • Add Ray Traceable Light to any light in the scene to have the plugin register it for lighting
  • Add Ray Traceable Object to any object in the scene to have the plugin register it for rendering. Must have at least a valid Mesh assigned in the MeshFilter
  • Use Ray Tracer Material which uses a PBR model to shade objects

  

Credits

Heavily influenced by:

• Unity Native Rendering Plugin
• rtxOn
• NVIDIA Vulkan Ray Tracing Tutorials
• Khronos Vulkan Samples

Shaders built with theories referenced in:

• coding labs
• Graphics Programming Compendium
• Learn OpenGL
• Scratchpixel

Includes zips with versions used to build for:

• glm - OpenGL Mathematics (GLM) library for graphics software based on the OpenGL Shading Language (GLSL) specifications.
• glslang - An OpenGL GLSL and OpenGL|ES GLSL (ESSL) front-end for reference validation and translation of GLSL/ESSL into an internal abstract syntax tree (AST).
• volk - Meta-loader for Vulkan