Plane-Parallel Radiance Transport for Global Illumination in Vegetation. - Nelson L. Max; Durtis Mobley; Brett Keating; Enhua Wu (Rendering Techniques, 1997)

Shadow Penumbras for Complex Objects by Depth-Dependent Filtering of Multi-Layer Depth Images. - Brett Keating; Nelson L. Max (Rendering Techniques, 1999)

Hierarchical Image-Based Rendering using Texture Mapping Hardware. - Nelson Max; Oliver Deussen; Brett Keating (Rendering Techniques, 1999)

Efficient Shadow Antialiasing Using an A-Buffer. - Brett Keating (J. Graphics, GPU, & Game Tools, 1999)