Irregular Z-Buffers

We further describe and analyze a real-time system for rendering antialiased hard shadows using irregular z-buffers (IZBs) that we first presented in Wyman et al.. We focus on identifying bottlenecks, exploring these from an algorithmic complexity …

We present a real-time system that renders antialiased hard shadows using irregular z-buffers. For subpixel accuracy, we use 32 samples per pixel at roughly twice the cost of a single sample. Our system remains interactive on a variety of game assets …