When "Camera.main.WorldToScreenPoint(hit.transform.position" is used to determine the position of the GUI when cast on the cube game object, the GUI.SelectionGrid displays blurry interface. The clarity of the buttons seems to vary based on the distance between the cube and the camera, although that does not appear to happen when "Camera.main.WorldToScreenPoint(hit.point)" is used, or even "Input.mousePosition" works just fine.

Steps to reproduce:
1. Open attached project
2. Open "Main level" scene
3. Run the game
4. Point the mouse on the cube

Expected result: GUI looks sharp and clear
Actual result: GUI looks blurry

Reproduced on versions: 5.2.3f1, 5.3.3f1.
Not reproduced on version: 5.1.1f1.