Hi Yousaf @ysaf ,
When you have a Cube, with a Subdivision Surface Modifier on it, you only have 8 Vertices, that you can ‘manipulate’ in Edit Mode, or Sculpt Mode.
That is why you must Apply the Modifier, to get more Vertices to work with.
Whether you Add the Subdivision Surface Modifier in Object Mode or Sculpt Mode, makes no difference. The exception is, when you Add the Modifier with the shortcut CTRL+(1, 2, 3, 4, or 5). Then, in Sculpt Mode, a Multires Modifier will be Added, instead of a Subdivision Surface Modifier.
The Multires Modifier doesn’t need to be Applied.
See Lesson 1 in Chapter 2 of this Course.
