Workstations have a large number of advantages for use as a personal computing resource. Unfortunately, currently these machines do not have enough performance to provide interactive 2-D and 3-D imaging capability, and aren't likely to in the foreseeable future. Consequently, they must be accelerated in some fashion. Accelerators need to be physically, visually, and computationally integrated with the workstation to be of maximum effectiveness. Furthermore, the rapidly changing requirements and increasing functionality of today's applications demand a high level of flexibility, impossible to meet with a traditional hardwired image processor architecture. This paper will describe the development of one form of the new breed of imaging accelerator and experiences (and lessons learned) from its application to a variety of problems.