Because the line on the bottom is large, the trick I use is visible.In this screenshot, another appearance texture is applied.
Recently, an article published in ShaderX7 proposed a method very similar, if not same, to the one I propose. I should have written an article before... At that time, I was beginning my Master study and I cannot imagine this would be possible.
Many people write to me in order to discuss this method, and I am really happy to see people using it. I am pleased to announce that my method is use in an iPhone game developed by a French guy as you can read on one if his post and blog. :)