When you increase the Mean crease on an edge is it only visually changed, like smooth shading? Or does it stay once you apply the subdivision modifier? For example if I were to create a model with the intention of 3D Printing it, when I export the file as an STL obviously the smooth shading would not carry over to the STL file. But if I had a Subdivision modifier and applied it during export it would smooth the file. So would the creased edges stay sharp at that point?