Lay meditation in Korean Zen

Have there been reform movements in 20th century Korean Buddhism that put more emphasis on meditation practice than traditional Korean Buddhism did, and that, in particular, also encouraged meditation by lay people? Put differently, I wonder whether Korean Buddhism has had a reform movement similar to, say, the reform movement of Mahasi Saydaw in Burma (that, in turn, was important to the development of Vipassana meditation as practiced by many in the US).