OptionaldurationOptionalflickerseconds between re-rolling the jitter, so a held tether flickers; omit to jitter once and hold
Optionaljitterperpendicular jitter amplitude in world units, tapering to 0 at both endpoints; default 12
Optionalrandominjectable RNG (0 to 1) for a reproducible bolt shape; defaults to Math.random
Optionalsegmentshow many jittered points along the line, between the two fixed endpoints; default 6
seconds this arc lives before
donebecomes true; omit for a bolt with no lifetime of its own