Node = 0
Render = 3 2 17 18
NoRender = 17 18 3 2

Node = 1
Render = 6 5 2 3
NoRender = 2 3 6 5

Node = 2
Render = 18 0 1 3
NoRender =

Node = 3
Render = 0 2 5 1
NoRender =

Node = 4
Render =  9 8 5 6
NoRender = 5 6 9 8

Node = 5
Render = 3 1 4 6
NoRender =

Node = 6
Render = 1 5 8 4
NoRender =

Node = 7
Render = 19 20 8 9
NoRender = 8 9 19 20

Node = 8
Render = 7 9 6 4
NoRender =

Node = 9
Render = 20 7 4 8
NoRender =

Node = 10
Render = 13 12 15 16
NoRender = 15 16 13 12

Node = 11
Render = 20 19 12 13
NoRender =12 13 20 19

Node = 12
Render = 16 10 11 13
NoRender =

Node = 13
Render = 10 12 19 11
NoRender =

Node = 14
Render = 16 15 18 17
NoRender = 18 17 16 15

Node = 15
Render = 17 14 10 16
NoRender =

Node = 16
Render = 14 15 12 10
NoRender =

Node = 17
Render = 15 14 0 18
NoRender = 0 18 15 14

Node = 18
Render = 14 17 2 0
NoRender = 2 0 14 17

Node = 19
Render = 13 7 20 11
NoRender = 13 11 7 20

Node = 20
Render = 9 7 11 19
NoRender =