In the newest OC Blender version, the displacement node issue is still not resolved yet. As I remember, in old versions, the displacement node allowed us to input the resolution in a textbox, and that's good enough for us. Currently the dropdown menu restricted our options, and most importantly, on the edge of geometry, the displacement will cause terrible cracks/glitch until we scale the UV down by few pixels. It brings big problems to usage like tiled displacement maps, and it kicks landscape artists out of Octane world
Please fix this bug ASAP or revert the displacement node back to old version that allows text input for the resolution. Thanks