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Particle trimmer
Thursday, May 21, 2009 | Permalink

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This is a commandline tool that takes a source image of a particle as input and generates an optimized polygon that fully encloses the particle in as tight area as possible given the provided number of vertices allowed. This can save a considerable amount of fillrate on particle systems. You can specify the alpha threshold value to use when deciding what pixels belong to the particle and not. The tool also supports using an altas of particles provided the atlas tiles are all the same size.