I tried lots of version for rendering.
I think 4 and 8 almost same to me 
4 is the my favourite.
1- Prerender0 and render0 Tris:768
2- Pre:0 Render:1 Tris:768
3- Pre:0 Render:2 Tris:768
4- Pre:0 Render:3 Tris:768
5- Pre:1 Render:1 Tris:3072
6- Pre:1 Render:2 Tris:3072
7- Pre:1 Render:3 Tris:3072
8- Pre:6 Render:6 Tris:3,145,748 more than 3million
