unHighlightIfcItems() {
            this.context.items.ifcModels.forEach((model) => this.unHighlightItem(model));
            this.highlight.unpick();
            if (this.context.renderer.postProduction.active) {
                this.context.renderer.postProduction.visible = true;
            }
        }
Unapplies the highlight material, removing the fading of the model