Many thanks Nebular and PFC666.
Creating A Bird’s Nest In ZBrush Using Curves. A recipe.
Curve Multi Tube (with snap switched on in strokes>curve) with a lowered z depth for flatter profile was used for the main construct of the nest - curves were drawn around the proxy form with the topology brush or zremesher guides. The advantage of the Curve Multi Tube brush is that it will draw out all the geometry over all the visible curves at once with one click. The created geometry was duplicated and revolved - moved out at edges of the nest’s curve as well as woven with the move topology brush.
NB: That curve tube multisnap does not allow for size tapering at the curve ends - of course you can taper these manually using the smooth brush etc. To allow for automated tapering of curve (curve modifiers size , curve falloff) use a brush such Curve Tube Snap instead.
A torus was used as a proxy shape at the top of the nest - this used Curve Tube Snap which does allow for a size taper but not to all visible curves simultaneously - instead each zremesher curve was tapped - then press 5 - then tap the next drawn curve etc around the proxy torus.
Spokes were drawn radiating out in straight lines from bottom to top of the inside proxy bowl/nest shape using used curved tube snap . Next >deformation twist was applied to give the spiral weave effect .This was duplicated and mirrored to create a more complicated sense of spiral weave and randomness throughout the nest.
Splendid!