Sims 3:0x312E7545

This resource is basically a list of grid positions for the ends of wall segments, and at the end a list of wall segments referencing the first list. The indexes are not straight arrays, the value can be in any order and they do not have to be contiguous or start from 0. Presumably some outside data dictates what the value can be, but it is unclear what.

DWORD 1
DWORD 0
DWORD lot width + 1
DWORD lot height + 1
DWORD (1-7)
DWORD max wall vertex index
DWORD max wall edge index

DWORD count
REP count
    DWORD wall vertex index
    FLOAT X position
    FLOAT Y position
    DWORD

DWORD count2
REP count2
    DWORD

DWORD count3
REP count3
    DWORD wall edge index
    DWORD wall vertex index
    DWORD value from count2 list
    DWORD wall vertex index
    DWORD value from count2 list