one pass per subpixel sample) through the hardware rendering pipeline.The resulting image is very high quality, but the performance degrades in proportion to the number of subpixel samples used by the filter function.This paper describes algorithms for accelerating antialiasing in 3D graphics through low-cost custom hardware.The rendering architecture employs a multiple-pass algorithm to perform front-to-back hidden surface removal and shading.Coverage mask evaluation is used to composite objects in 3D.The key advantage of this approach is that antialiasing requires no additional memory and decreases rendering performance by only 30-40% for typical images.The system is image partition based and is scalable to satisfy a wide range of performance and cost constraints.

This paper describes algorithms for implementing accurate rendering of CSG and transparency in a hardware 3D accelerator. The algorithms are based on a hardware architecture which performs front-to-back Z-sorted shading; a multiple-pass algorithm which allows an unlimited number of Z-sorted object layers is also described. The multiple-pass algorithm has been combined with an image partitioning algorithm to improve efficiency, and to improve performance of the resulting hardware implementation.