[2019] Cannot get parallax mapping to work. The material just blurs with no actual height

Side note: POM is extremely expensive. Judging by your screenshots you could achieve this effect with actual (normal mapped) geometry representing most of the carved wood details and a simple bump offset if necessary. It will be much more efficient, as well as integrating better with lighting and post-process effects. POM is an expensive hack best reserved for things that can not be represented well using reasonable triangle counts such as highly detailed terrain (and even then only as an “ultra” quality graphics option).