Simple Path Tracer – Windows Release

A lightweight physically-based path tracing renderer with CPU and GPU backends, focused on clarity, correctness, and experimentation.

Features

• Monte Carlo path tracing
• Progressive accumulation
• Physically-based materials
  • Diffuse
  • Metal
  • Dielectric (glass)
  • Emissive
• Environment lighting
  • Procedural sky
  • Optional HDR environment maps
• Directional light support (GPU backend)
• Resolve stage with tonemapping + gamma correction
• Two rendering backends
  • CPU: Intel Embree 4 + TBB (reference implementation)
  • GPU: NVIDIA OptiX wavefront-style path tracing
• Interactive camera controls
• Runtime backend switching (CPU ↔ GPU)

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How to Run

Launch

Double-click:

Controls

• W / A / S / D – move camera
• Mouse – look around
• ESC – exit
• G – toggle rendering backend
  • CPU Embree path tracer
  • GPU OptiX wavefront path tracer

Windows Release – Prebuilt Executable

🟦 Simple Path Tracer – Windows Release

This release contains a prebuilt Windows executable of the CPU-based path tracer built with Intel Embree 4 and TBB.
No compilation is required — simply unzip and run.

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✔ Features Included

• Real-time Monte Carlo path tracing
• Embree 4 accelerated BVH traversal
• PBR materials (diffuse, metal, glass)
• HDR environment lighting
• glTF 2.0 model loading
• Progressive sample accumulation
• WASD + mouse camera control

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📦 Included in this ZIP

• simple-path-tracer.exe
• assets/
  • hdri/
  • models/
  • other resources
• Optional: README.txt (quick start guide)

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▶ How to Run

Double-click:

simple-path-tracer.exe

Optional command-line usage:

simple-path-tracer.exe -i model.gltf -s environment.hdr

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❗ Notes

• Windows only
• CPU must support SSE4.2 (Embree requirement)
• No installation required