setStencilTest( stencilTest ) {

		const { gl } = this;

		if ( stencilTest ) {

			this.enable( gl.STENCIL_TEST );

		} else {

			this.disable( gl.STENCIL_TEST );

		}

	}
Specifies whether the stencil test is enabled or not.

@param {boolean} stencilTest - Whether the stencil test is enabled or not.