Trying to follow an Andrew Price tutorial for procedural displacement but when the tutorial goes to procedural displacement I get zero effect, except in surface shadows, when the edges of the object should be displaced, and in the tut look like a sea urchin. Have tried this a few times but can't see where I am going wrong, it seems to be a really simple thing but all the other resources I can find are discussing slightly different procedures. To be clear - I am trying to apply a procedural noise texture (not UV mapped) to a simple object. It doesn't make any difference if I subsurf it or not. He says to change the material option from Bump to Displacement in the material settings but in 2.81 it is default anyway. I want to make a big ocean scene with physically large waves.
I have tried some solutions from the youtube comments such as turning on a bit of subsurf - although that makes no difference and I don't know what it has to do with displacement... Tried turning on experiemental features, double checking I am using cycles... Checked all views, including rendering, this thing is still as smoooth as eggs