Controls

Escape - Exit
Space - Reset
WASDFR - Translate Camera
G - Increase Aperture Diameter
H - Decrease Aperture Diameter
T - Increase Focal Distance
Y - Decrease Focal Distance
Arrows - Yaw/Pitch
Prtsc - Export

-width    "{integer}: window's width"
-height   "{integer}: window's height"
-scene    "{string}: filepath of the scene you want to render"
-hdr      "{string}: filepath of the hdr you want to use"
-alpha    "{void}: add this flag if you want to enable alpha blending"
-encoder  "{integer}: { 0: ".png", 1: ".hdr" }"

hdrihaven is a great site for downloading free hi-res HDR images.

Features

• SAH BVH
• Volumetric pathtracing (homogeneous, exponential medium)
• Multiple Importance Sampling (MIS)
• SDF Raymarching
• Thin lens camera
• Image-based lighting
• Alpha blending
• Media
  • Homogeneous
  • Exponential
• Phase functions
  • Isotropic
  • Henyey-Greenstein
  • Rayleigh
• Materials
  • Lambertian BRDF
  • Burley BRDF
  • Rough Conductor
  • Rough Dielectric + Absorption
  • Microfacet
    • GGX
    • Beckmann
    • Phong
  • Smooth/Flat shading

Possible Future work

• Quasi Monte Carlo
• Disney's principled, layered BRDF
• Volumetric pathtracing (heterogeneous medium)
• Volumetric pathtracing (SDF density map)
• Photon Mapping
• Bi-Directional PT
• MLT
• Sheen BRDF
• Blinn Phong Microfacet BRDF
• Oren-Nayar BRDF
• Denoiser
• LBVH using spatial Morton codes
• Phong Tessellation

How To Build

Prerequisites

• CMake 3.30 or later
• A C++20 compatible compiler (GCC, Clang, or MSVC)
• Git

Clone the Repository

git clone --recursive https://github.com/Mourtz/Photorealistic-Rendering-using-OpenCL.git
cd Photorealistic-Rendering-using-OpenCL

If you have already cloned the repository without this flag, run:

git submodule update --init --recursive

Build

cmake -B build
cmake --build build --config Release

The binary will be located in build/bin/.

vcpkg is used as a package manager via manifest mode (vcpkg.json). Dependencies are resolved automatically during the CMake configure step. The first build may take some time as vcpkg downloads and builds required libraries.

Credits

tunabrain - Benedikt Bitterli
sebadorn - Sebastian Dorn
mmp - Matt Pharr