Render and Ray
This document describes the Alpha_1 rendering programs render
and ray which produce shaded images. Render operates
with a traditional scanline polygon fill algorithm and a Z-buffer
hidden surface algorithm. Ray used a ray-tracing algorithm for
more realistic images.
Images are generally produced in the
Utah Raster Toolkit (URT) run-length-encoded (RLE) format.
URT programs are used to display, convert, or further manipulate the
image (e.g., getx11).