Using 4.2. For some reason creasing isn't sharpening the edges and vertices on top of the subdiv modifier. Any reason why this may be happening?
Hmmm, that is ultra weird. I'm going to say it must be definitely a bug. Can you try it on a totally new file with the default cube? Just to see if it's that file you have or if it's the Blender version you have in general. I guess a couple of things I would do is to update stuffs on the computer, Windows update, Video Card drivers updates, then re-download Blender and try it out again.
Under Advance sub-panel of the Subdivision Surface modifier, make sure Use Creases is checked.
Had the Use Crease option checked all along. Sorry for not including. Omar was right though, seemed to be a bug. Tried with a new file and still didn't work. Restarted my PC, opened Blender and started a new project and that seemed to have fixed it.
