Tesserace 3D Path Tracing Test

Rays are fired from the camera out into the scene, bounce around according to physical models, and record when they hit a light source. Whenever anything changes, the scene has to be re-traced (it starts out noisy, but converges to the correct image).

WASD for forwards/backwards/sideways motion, arrow keys to rotate, and Q/E to roll.

Outdoors Indoors Color and Caustics Distance Field Experiment (slow!)

Linear Reinhard Filmic
Exposure

(perspective only for now)
Blur Amount
Focal Length

Perspective Stereographic

Nothing
Rotate (around focal point)
Focus on point (when clicked or dragged)
Light at point (when clicked or dragged)
Drag spheres (not too many, shader uniforms limited)

Constant (white/gray)
Custom GLSL Expression
Update
HDR Skies downsampled from Vizpeople's free (non-commercial) environment maps:
Sky 01 (2048x512) (4096x1024)
Sky 02 (2048x512) (4096x1024)
Sky 03 (2048x512) (4096x1024)
Sky 04 (2048x512) (4096x1024)
Sky 05 (2048x512) (4096x1024)
Sky 06 (2048x512) (4096x1024)
Sky 07 (2048x512) (4096x1024)
Sky 08 (2048x512) (4096x1024)
Sky 09 (2048x512) (4096x1024)
Sky 10 (2048x512) (4096x1024)
HDR Skies from openfootage.net free (attribution) environment maps:
Dusk (2048x512)
Rotation
Extra Sun

256px 512px 1024px

• Scale down to other aspect ratios / non-power-of-2-sizes
• Other tone mapping options (Reinhard)?
• Filtering to remove aliasing
• Improved importance sampling
• Bloom shader (mipmap down, blur with separable kernel at each stage after thresholding for brightness).
• Variance output (trackable with 2 floats).
• HDRI export (floating-point export workaround).
• Distance fields for water glass (and consider elliptical acceleration). Milk with BSSRDF?
• Use textures and multi-pass for rendering many-triangled objects.
• Consider persistent texture for improved PRNG
• Spectral rendering, consider polarization and thin-film support for realistic camera model (with multipass!)
• 4D experimentation

Like it? Send me your thoughts at jonathan.olson@colorado.edu