At the recent National Computer Graphics Association conference, Bechtel Software Inc introduced 3DMX, a three-dimensional plant and facility design software package that runs in a stand-alone mode on Intergraph Clipper-based workstations with MicroStation software. In addition, the company introduced Shade, a colour shading package that runs on personal computers, for three dimensional computer models. 3DMX prices start at $5,000 and Shade is priced at $2,500. Separately, Bechtel announced a value-added resller agreement with Silicon Graphics Inc, under which Bechtel will offer Silicon Graphics’ Iris 3100 and 4D series of workstations with its Walkthru three-dimensional animation and visualisation system: Walkthru allows users to walk through realistic computer models of large industrial plants, buildings, ships, power plants and other facilities.