Nothing like an explanation to all.
Changes the tiles around the entity
radius (int, default 0)
x (int, default null): Will change based off relative x coordinate, likely not used with radius
y (int, default null): Will change based off relative y coordinate, likely not used with radius
perm (bool, default true): If another GroundTransform is active on the same tile, it will not change if true
<Behavior tile="Red Quad" radius="2" x="3" y="2" perm="false">GroundTransform</Behavior>