Approximate Program Smoothing Using Mean-Variance Statistics, with Application to Procedural Shader Bandlimiting

Fig. 1. Our paper gives a novel compiler framework for smoothing out programs in an approximate manner. Here we show how our smoothing framework can be applied to bandlimiting (antialiasing) procedural shader programs. In (a) is the ground truth result for a brick shader, estimated by using 1000 samples; (b) is the aliased result due to naively evaluating the original shader program; (c) is our result; (d) is the result of previous work; and (e) is multi-sample antialiasing (MSAA), chosen to use comparable run-time as our result. The L2 errors are reported in sRGB color space, with the inset heatmap depicting per-pixel L2 error. Our result has significantly less error, noise, and aliasing than other approaches.