
Groups:


Non-solid:

fully walkable (many. Also fake walls)



Non-solid hostile:

Walkable, but kills player (few)



Solid:

Not walkable (many)


Solid shootable respawn: (few)

Dissappears for some time when shot or bombed or missiled

Solid shootable non-respawn: (few)

Dissappears for good time when shot or bombed or missiled


Solid-Bombable: (few)

Dissappears for good when bombed. Not shootable by beam or missile


Solid shootable missile: (few)

Breaks/dissapear for good when shot by missile. 
Not shootable by beam. Not bombable.





0-127 All Non-solid
128-255 All solid