Available since LÖVE 0.8.0
It has replaced ParticleSystem:setSize.
Sets a series of sizes by which to scale a particle sprite. 1.0 is normal size. The particle system will interpolate between each size evenly over the particle's lifetime.
At least one size must be specified. A maximum of eight may be used.
ParticleSystem:setSizes( size1, size2, ..., size8 )
Nothing.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://love2d.org/wiki/ParticleSystem:setSizes