Ray symmetry
A sunflower reads as one composite head: a ring of ray petals around a dense disk. Stencil viability comes from countable, evenly spaced rays with open skin between neighbors, not from keeping every petal a photo shows.
Check: Count the rays on the reference, then cover every second ray. If the head still reads as a sunflower, the spacing is sound. If two neighboring rays share one merged edge at 1:1, reduce the ray layer before touching the disk.
