Kevin Steele

CS 6650

Programming Assignment #3: Path Tracing

On the left is my path traced rendering of the Cornell box using 1000 4D n-rooks-stratified samples per pixel, with a ray depth of 6.

On the right is a tone-mapped rendition of Cornell’s original synthetic rgbe image.

I used the tone-mapping operator Pete presented in class on both images, attempting to match the overall brightness between the two images. Interestingly, both images severely clamp the red wall, and neither image clamps the light source to white. I believe the difference in shading, most noticeable in the green walls, results from using different XYZ to RGB conversion matrices.

This is an Arnold-style rendering (hemispherical area light) of a free model obtained from 3dcafe.com. I used 500 samples per pixel.