CRISTAL Limitations 2: - The system is not yet capable of dynamically merging raster and vector based graphics environments. The potential for integrating the Targa 16 with a CADD program in the CRISTAL environment holds promise as a powerful graphic simulation tool, and the system developers recognize the need to develop this capability. The program had not been developed sufficiently at the time that the prototypes were assembled to integrate a full feature 2-D or 3-D CADD program with the raster graphics of the CRISTAL system. The prototypes did allow the system user to manipulate and display raster graphics that were digitized with the Targa 16 or constructed with CRISTAL's built-in graphics processing routines. - The image files created by the Targa 16 frame grab function are memory intensive, requiring approximately 418K of disk storage each for a full frame, uncompressed image file. Sophisticated image compression routines that can reduce individual image storage requirements by as much as 95% to 99% have recently been developed (i.e. "ALICE"), and these could greatly reduce the memory requirements of image based data systems. CRISTAL: Graphic Output CRISTAL: Limitations 1. CRISTAL: Data Storage