 
             /*!
              * @brief Vertex shader function.
+             *
              * @param [in] v  Input data
              * @return Output for fragment shader (v2f).
              */


            /*!
             * @brief Get color of reflection probe.
             * @param [in] refDir  Reflect direction.
             * @return Color of reflection probe.
             */


            /*!
             * @brief Get depth of the specified position.
             *
             * @param [in] p  3D-position.
             * @return Depth of the p.
             */
