API Reference > geometry-core > Serialization > IModelJson > IModelJson.PlanarRegionProps > loop loop loop: undefined | [IModelJson.CurvePrimitiveProps] {loop:...} A sequence of curves which connect head to tail, with the final connecting back to the first Defined in core/geometry/src/serialization/IModelJsonSchema.ts Line 134 Last Updated: 13 June, 2024