In most cases, to frame painting rolled up, can be done.   The canvas can be unrolled, relaxed and either or fully framed Sometimes though, this isn't possible. In some cases, what happens is that the oil painting has been painted quite thickly, almost palette-like, that it has dried up, while tightly rolled up, and that on unrolling and straightening it, the surface of the painting starts to crack. In other instances, the artist who painted the canvas hasn't used quality oil painting media but cheaper ...