API Reference > geometry-core > Polyface > PolyfaceData > twoSided twoSided Accessor boolean tag indicating if the facets are viewable from the back twoSided: boolean Returns - boolean Setter boolean tag indicating if the facets are viewable from the back twoSided(value: boolean): void Parameter Type Description value boolean Returns - void Defined in polyface/PolyfaceData.ts Line 73 Last Updated: 29 November, 2022