Computer modelling of fallen snow

In this paper, we present a new model of snow accumulation and stability for computergraphics. Our contribution is divided into two major components, each essential for modelling the appearance of a thick layer of snowfall on the ground. Our accumulationmodeldetermines how much snowa particular surface receives, allowing for such phenomena as flake flutter, flake dusting and wind-blown snow. We compute snow accumulation by shooting particles upwards towards the sky, giving each source surface independent control over its own sampling density, accuracy and computation time. Importance ordering minimises sampling effort while maximising visual information, generating smoothly improving global results that can be interrupted at any point. Once snow lands on the ground, our stability model moves material away from physically unstable areas in a series of small, simultaneous avalanches. We use a simple local stability test that handles very steep surfaces, obstacles, edges, and wind tra...

• Type: Conference
• Year: 2000
• Where: SIGGRAPH
• Authors: Paul Fearing
• Keywords: Computer Graphics, SIGGRAPH 2000, Simple Local Stability, Snow Accumulation, Wind-blown Snow