Help wanted - tileset modification

i’ve just started working w/arkangel’s rural coastline tileset. overall it looks pretty decent, but there’s one limitation i’d like to overcome, if possible : the stream crosser won’t go all the way down to the shallows, as it does w/the water.

the tile that works grass->water is ttr01_g11_01, from the standard rural tileset.

i modified tcst1.set to add a new tile definition, copying the entry for ttr01_g11_01 [rule 58] and changing references of ‘water’ to ‘shallows’.

this didn’t work.
[surprise…]

maybe there’s something else i have to change [such as tcst1_edge.2da] ? although the *_edge.2da files are mentioned in one of the tutorials i looked at, i haven’t been able to find a thorough explanation of it anywhere.

just wondering if anyone could help me overcome my naïveté so i can get this to work.

fwiw, here’s the full entry for the new rule :

[TILE317]
Model=ttr01_g11_01
WalkMesh=msb01
TopLeft=Shallows
TopLeftHeight=0
TopRight=Grass
TopRightHeight=0
BottomLeft=Shallows
BottomLeftHeight=0
BottomRight=Grass
BottomRightHeight=0
Top=
Right=Stream
Bottom=
Left=
MainLight1=1
MainLight2=1
SourceLight1=1
SourceLight2=1
AnimLoop1=1
AnimLoop2=1
AnimLoop3=1
Doors=0
Sounds=0
PathNode=I
Orientation=180
VisibilityNode=A
VisibilityOrientation=180
ImageMap2D=MITR01_G11