Silhouette curve continuity
A snake reads first as one continuous body curve with a clear head at one end and a tapering tail at the other. Stencil viability comes from an unbroken outer contour with open skin wherever the body passes near itself, not from drawing every scale a photo shows. Coiled loops stack body segments close together and merge first, so loop spacing should be ranked before line weight changes.
Check: Cover the head and tail tips. If the body still reads as one flowing ribbon with visible skin between neighboring passes, the silhouette survives reduction. If two passes share one edge, the spacing needs opening, a larger length, or one fewer loop before anything else changes.



