(Picture Level Benchmark) A benchmark for measuring graphics performance on workstations. The Benchmark Interface Format (BIF) defines the format, the Benchmark Timing Methodology (BTM) performs the test, and the Benchmark Reporting Format (BRF) generates results in PLBmarks (formerly GPCmarks), which are divided into PLBwire93 (wireframe modeling) and PLBsurf93 (surface modeling) ratings. Image quality is not rated. See GPC.