Transparent shapes ? (stroke but no fill).

Reduced opacity ? (fill but only fractionally opaque, no shadow ?)

The stencil at http://www.graffletopia.com/stencils/244 ?

Not quite sure what properties you are really after – might be worth expanding a little on the problem you are trying to solve, and what, in particular, you mean by 'at the same level'. (Siblings in the outline view ? All on the same layer ? No overlaps ?)

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