Name
Title | ||
|---|---|---|
Precomputed radiance transfer for real-time rendering in dynamic, low-frequency lighting environments. |
Abstract | ||
|---|---|---|
We present a new, real-time method for rendering diffuse and glossy objects in low-frequency lighting environments that captures soft shadows, interreflections, and caustics. As a preprocess, a novel global transport simulator creates functions over the object's surface representing transfer of arbitrary, low-frequency incident lighting into transferred radiance which includes global effects like shadows and interreflections from the object onto itself. At run-time, these transfer functions are applied to actual incident lighting. Dynamic, local lighting is handled by sampling it close to the object every frame; the object can also be rigidly rotated with respect to the lighting and vice versa. Lighting and transfer functions are represented using low-order spherical harmonics. This avoids aliasing and evaluates efficiently on graphics hardware by reducing the shading integral to a dot product of 9 to 25 element vectors for diffuse receivers. Glossy objects are handled using matrices rather than vectors. We further introduce functions for radiance transfer from a dynamic lighting environment through a preprocessed object to neighboring points in space. These allow soft shadows and caustics from rigidly moving objects to be cast onto arbitrary, dynamic receivers. We demonstrate real-time global lighting effects with this approach. |
Year | DOI | Venue |
|---|---|---|
2002 | 10.1145/566570.566612 | SIGGRAPH |
Keywords | Field | DocType |
low-frequency lighting environment,dynamic lighting environment,actual incident lighting,radiance transfer,local lighting,low-frequency incident lighting,rendering,real-time global lighting effect,glossy object,monte carlo techniques,precomputed radiance transfer,shadow algorithms,preprocessed object,graphics hardware,real-time rendering,illumination,soft shadow | Computer vision,Per-pixel lighting,Volumetric lighting,Spherical harmonic lighting,Computer graphics (images),Computer science,Image-based lighting,Ambient occlusion,Artificial intelligence,Precomputed Radiance Transfer,Rendering (computer graphics),Rendering equation | Journal |
Volume | Issue | ISSN |
21 | 3 | 0730-0301 |
ISBN | Citations | PageRank |
1-58113-521-1 | 468 | 21.59 |
References | Authors | |
34 | 5 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Peter-Pike J. Sloan | 1 | 1093 | 73.36 |
| Jan Kautz | 2 | 3615 | 198.77 |
| John Snyder | 3 | 2579 | 172.17 |
| Eugene Fiume | 4 | 1792 | 233.44 |
| SloanPeter-Pike | 5 | 487 | 22.61 |