Lead lines are a very important part of making stained glass. They provide us with a way to make complex cuts much easier. Below is a window that I found on the internet. You'll note that any time any part of the flower forms a point there is a lead line running from that point to the outside edge of the background glass. The thing is, not all of those lines are necessary. Also, by making those lead lines run straight the look jarring and detract from the rose itself. Simply curving those lines will soften the look of this window dramatically.
Now here's my modified idea of the same basic pattern. First I removed two of the top lead lines that previously ran to the top of the window. Although the petals have points there they are very soft points that honestly don't need lines running from them. To 'fix' the other lines I simply curved them so that they flow with, rather than fracture, the background glass. Scroll back and forth between the two images and I think you'll see that the bottom one is a far more graceful window. Next week I'm going to curve the flower itself to show you just how important curves are.