I have a displacement map on a highly subdivided plane, with a brick texture feeding into the displacement node. This image shows the viewport render on the left, with perfect square tiling on the floor. On the right; the image editor with the render preview showing. The tiling on the floor is warped strangely, creating rectangles in some regions. This is the node setup used for the displacement of the floor.
If anyone has any suggestions as to what could be causing this discrepancy, I would be most appreciative.