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

Windows

git clone https://github.com/microsoft/vcpkg.git
move vcpkg C:/dev
cd C:/dev/vcpkg && bootstrap-vcpkg.bat

Linux

git clone https://github.com/microsoft/vcpkg.git
mv vcpkg /home/user
cd /home/user/vcpkg && ./bootstrap-vcpkg.sh

Credits

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