I spent hours today trying to create a plant that used several curved planes with alphas aplied. This creaeed the alpha sorting glitch. After a lot of trial and error, I have something that mostly works.
I am trying to create a mesh plant. Using a curved plane, I duplicate it and flip the normals so it has the same mesh for the top and bottom. I do not join the meshes. I import the mesh into second life. When I apply the texture,I apply it to the bottom mesh first, then the top. This