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Levelsets in production: Spider-Man 3 ( siggraph 2007 )

Levelsets in production: Spider-Man 3 ( siggraph 2007 )

Levelsets are a flexible implicit surface representation that have
many applications in production. A levelset represents a surface
as a signed distance function (SDF) on a regularly sampled grid.
For Spider-Man 3, we created a toolset called Sandstorm which in-
cluded a rich set of levelset-based modeling and animation tools.
This included methods for converting geometry into SDF felds and
vice versa, methods for transferring surface attributes into these
fields, tools for looking up values in an SDF, and many other flexi-
ble surface editing operators.