Hmm, strange?
For me it's a square and I click in any other square I want to make "out of bounce" or "in bounce".
Works like
PAINT in windows.
It will light up squares as red when you move it around.
You see text on squares, Dirt, Dry Grass, Wet Grass and Out of Bounce? F2 menu.
You can hold it down and use it like a pencil aswell.
You ca also select differant sizes of it 1-9.
It should be a grid and every suface square is a number.
0-9 I think.
When you press save it will generate a picture in format raw.
Something like this. Every number is a square in game/editor.
0000000000000000000
0011222222211111100
0112222333222111110
0111444552223331110 <--- Very small map btw
0111112277333322110
0011111222554432210
0001111112222221000
0000000000000000000
You will not see this, but this is how it works.
BCV translate every number to a surface and that's what you see in editor when you press F2.
This is how we can fool server to remove or ad out of bounce serverside. We upload picture to patchfile.
(Hightmap works basicly the same.
0=Black
255=White
Black is as low as you can go and white is as high as you can go.
But it's not the squares that get number now, it's where the gridlines cross each other.)