Decided to make a "Wunberbaum".Yes i know it looks a little bit bad, too many triangles but still low quality, but yeah this is the first thing i have made
You seem to be creating triangles manually for the edge of the tree - instead you could use the extrude function and it would create the triangles automatically.
Here is the File for TDI lovers, you can use this on your owns mods, enjoy, do not forget to put the png to LFS Editor. Don't forget to credit me while using this.