Positron Sniper Rifle

A toy unidirectional path tracer based on NVIDIA Optix7, used as my graphics exercise, and simple enough to be used to learn Optix.

Features

Thanks to Optix API (and RT core), fully squeeze the performance out of the graphics card

Without full optimization, 2K resolution on a RTX4090 can achieve real-time level performance
Next Event Estimation for any shape and number of light sources
Two-level BVH for instancing (IAS and GAS in Optix)
Disney BRDF and its metal/roughness workflows
Bessel's parametric surface intersection based on Newton's iterative method
Global fog, volume light, and dispersion