Practical Rendering of Multiple Scattering Effects in Participating Media (2004)
H. W. Jensen, A. Keller (editors, Simon Premoze, Michael Ashikhmin, Ravi Ramamoorthi, Shree Nayar
Volumetric light transport effects are significant for many materials like skin, smoke, clouds, snow or water. In particular, one must consider the multiple scattering of light within the volume....
Eurographics Symposium on Rendering 2003, pp. 1--12 (2003)
Simon Premoze, Michael Ashikhmin
Simulating the transport of light in volumes such as clouds or objects with subsurface scattering is computationally expensive. We describe an approximation to such transport using path integration....
Michael Ashikhmin, Abhijeet Ghosh
We present a technique which uses existing OpenGL capabilities to approximate the effect of blurry specular reflections and indirect diffuse illumination. It makes use of environment maps, mipmapping...
Steerable Illumination Textures (2002)
Michael Ashikhmin, Peter Shirley
We introduce a new set of illumination basis functions designed for lighting bumpy surfaces. This lighting includes shadowing and interreflection. To create an image with a new light direction, only...
Rendering Natural Waters (2002)
Simon Premo Ze, Michael Ashikhmin
Creating and rendering realistic water is one of the most daunting tasks in computer graphics. Realistic rendering of water requires that the sunlight and skylight illumination are correct, the water...
A Tone Mapping Algorithm for High Contrast Images (2002)
Paul Debevec, Simon Gibson (editors, Michael Ashikhmin
A new method is presented that takes as an input a high dynamic range image and maps it into a limited range of luminance values reproducible by a display device. There is significant evidence that a...
Approximate methods for improving surface appearance /--by Michael Ashikhmin. (2001)
Thesis (Ph. D.)--School of Computing, University of Utah, 2001.
A Variance Analysis of the Metropolis Light Transport Algorithm (2000)
Michael Ashikhmin, Simon Premo Ze, Peter Shirley, Brian Smits
The Metropolis Light Transport algorithm is a variant of the classic Metropolis method used in statistical physics. A variance analysis of the Metropolis Light Transport algorithm is presented that...
An Anisotropic Phong Light Reflection Model (2000)
Michael Ashikhmin, Peter Shirley
We present a new BRDF model that attempts to combine the advantages of the various empirical models currently in use. In particular, it has intuitive parameters, is anisotropic, energy-conserving,...
An Anisotropic Phong BRDF Model (2000)
Michael Ashikhmin, Peter Shirley
We present a BRDF model that combines several advantages of the various empirical models currently in use. In particular, it has intuitive parameters, is anisotropic, conserves energy, is reciprocal,...
Rendering Natural Waters (2000)
Simon Premoze, Michael Ashikhmin
Creating and rendering realistic water is one of the most daunting tasks in computer graphics. Realistic rendering of water requires that the sunlight and skylight illumination are correct, the water...
A Microfacet-based BRDF Generator (2000)
Michael Ashikhmin, Simon Premo, Peter Shirley
A method is presented that takes as an input a 2D microfacet orientation distribution and produces a 4D bidirectional reflectance distribution function (BRDF). This method differs from previous...
Synthesizing Natural Textures (2000)
We present a simple texture synthesis algorithm that is well-suited for a specific class of naturally occurring textures. This class includes quasi-repeating patterns consisting of small objects of...
Rendering Natural Waters (2000)
Simon Premoze, Michael Ashikhmin
. Creating and rendering realistic water is one of the most daunting tasks in computer graphics. Realistic rendering of water requires that the sunlight and skylight illumination are correct, the...
A Microfacet-based BRDF Generator (2000)
Michael Ashikhmin, Simon Premo, Peter Shirley
A method is presented that takes as an input a 2D microfacet orientation distribution and produces a 4D bidirectional reflectance distribution function (BRDF). This method differs from previous...