The latest developments in rendering, visualization, andrasterization hardware are reported in this volume, whichcontains revised versions of thecontributions to the SixthEurographics Workshop on Graphics Hardware, held in Viennain September 1991 in conjunction with the Eurographics '91Conference. The book has five parts and a keynote paper, "Issues andDirections for Graphics Hardware Accelerators", by KurtAkeley. The first part of the book concerns graphicshardware design, including simulation and silicon compilers. The second part contains two papers on graphics systems. Thethird part focuses on volume (voxel-based) machines, describing two devices to facilitate transformations ofvolumes. The fourth part includes papers on rasterizationsystems, including character rasterization andscan-conversion of triangular faces. The papers in the lastpart of the book focus on rendering machines. They include aprogrammable rendering engine, primitive shaders, andradiosity implementation on a parallel architecture.