MyGPURaytracer

A high performance monte-carlo raytracer programmed with CUDA. There are various improval features such as AI denoising, cache first bounce, sort materials, arbitrary mesh loading. etc in it. The implementation of the paper "Edge-Avoiding A-Trous Wavelet Transform for fast Global Illumination Filtering" is in branch atrous as it conflits with the AI denoise feature.

Features

• Monte-Carlo ray tracer on GPU;

• BSDF Evaluation: pure diffuse, reflection and refraction, diffuse+specular;

  Purely Diffuse	Reflective
  Refractive	Diffuse & Reflective

• AI denoise implemented with Intel Open Image Denoise;

  Use albedo image as an auxiliary to reduce noise (oidnRayTraced.exe file output denoised result in real-time).

  Ray-traced noisy result	Albedo	Denoised Result

• Use tinyobj to load arbitrary .obj model with its specular,diffuse, emission and bumping textures;

• Depth of field

  Focus on

  With Depth-of-Field	Without Depth-of-Field

• GPU improvement: stream compaction

• Cache first intersection

• Stochastic Sampled Antialiasing

TODO

For massive scenes:

• Wavefront pathtracing --group rays by material

Usage

Only support win32：

oidnRaytracer.exe directory/to/scene.txt

executable directory example:

--ProjectFolder
	|--build
	    |--bin
		|--Release
		    |--oidnRaytracer.exe
		|--models
		    |--materials
			|--a.mtl
		    |--a.obj 
		|--textures
		    |--a_kd.jpg
		    |--a_ks.jpg
		    |--a_emi.jpg