Thank you @Yerus you are very kind to answer, Yes I am using Arnold. This is the shape node setting that i am using, one might say this is default. When i tries to connect a file note to displacement mat, it does not seem connected in the hypershade, i am not sure if this is what supposed to be. I am trying to tweak some…
To get displacement working you need to connect the dispmap into the disp input of the shading node. https://docs.arnoldrenderer.com/display/A5AFMUG/Displacement could you post some maya wireframe shots?