cool, make it so you can put bricks in windows + door ways, open the blb in a text editor and at the top
map out your brick in text like
if your brick was a 6x1x15 door way your map would look like this I believe
6 1 15
SPECIAL
uuuuuu
x-----x
x-----x
x-----x
x-----x
x-----x
x-----x
x-----x
x-----x
x-----x
x-----x
x-----x
x-----x
x-----x
d-----d
this means we can place bricks inside any of the dashed (-) areas
d means we can place bricks under them, but not inside or above
u means you can place bricks over them, but not inside or below
and x means you cant place inside over or below
and if i recall b means you can't place bricks inside but you can place them above and below
and then after the brick grid mapping, you map out the collision boxes
new line after the brick grid definition
you specify the number of collision boxes
new line
then you each collision box has its position and new line scale
so a door would look something like this preceding the above brick grid definition
3
1 1 7
-2 0 0
1 1 7
2 0 0
6 1 1
0 0 4
please keep in mind this is a complete estimate and you should probably let the blb exporter handle these numbers and use a collision mesh object
then directly after your last collision box comes the coverage definitions, which are not as important as the collision and brick grid stuff as coverage just deals with what faces get hidden when bricks are put up against other bricks
