Multithreaded Ray Tracer

Ray Tracing in One Weekend

This project is an implementation of Peter Shirley’s
Ray Tracing in One Weekend,
the first book in the Ray Tracing trilogy series, written in C++.

In addition to single threaded implementation, I've added multithreading to keep the render time reasonable.

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Final Render (500 Samples Per Pixel, 1200×675)

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Performance Benchmark

My CPU is Intel Core i9-13900H with 8E and 6P cores (20 logical threads). The above image was rendered in about 5m 20s with all of the logical threads saturated and CPU utilization at ~95% with a base clock of 2.8GHz. The image consists of 500 samples per pixel, 50 Max recursion depth at 1200 x 675 resolution. The original PPM image was converted to PNG format using ImageMagick.

Render Time

Mode	Render Time
Single-threaded	2 hours 59 minutes
Multithreaded	5 minutes 20 seconds