Which is also a great illustration on the essential problem of UVmaps -- it is impossible on most objects to obtain minimal seams, equal-sized polys, and parallel lines (as they exist on the original shape), all at the same time. You always end up optimizing one over the other. A cylinder can be mapped so that there is only one seam to blend, and a square drawn on the texture will result in a square appearing on the surface -- a stripe across the texture will be a stripe around the cylinder, a stripe up and down will be a stripe down the length of the cylinder. But change to something as simple as a tapered cylinder (or a barrel). Now, no matter what you do, you can not make a map where a ring at the top and bottom of the tapered cylinder are both straight lines on the texture and of equal relative proportion. It is no longer possible to flood-fill texture (not in itself necessarily a bad thing...!)