war3map.shd — Shadow Map

No header. Raw byte array.

File size = 16 * map_width * map_height bytes

Each byte controls one 1/16-tile cell (tiles are subdivided 4×4):

Value	Meaning
`0x00`	No shadow
`0xFF`	Shadow

war3mapPath.tga — Image Path File (old, ≤ patch 1.21)

Standard 32-bit uncompressed RGB TGA with a black alpha channel.

Image size: (map_width * 4) × (map_height * 4) pixels (each tile = 4×4 pixels)
Top-left of image = upper-left corner of map

TGA header (18 bytes)

byte    ID Length           0
byte    Color Map Type      0
byte    Image Type          2  (uncompressed RGB)
--- Color Map Specification (5 bytes) ---
byte[2] First Entry Index   0
byte[2] Color Map Length    0
byte    Color Map Entry Size 0
--- Image Specification (10 bytes) ---
byte[2] X Origin            0
byte[2] Y Origin            0
byte[2] Image Width         map_width * 4  (LE)
byte[2] Image Height        map_height * 4 (LE)
byte    Pixel Depth         32 (0x20)
byte    Image Descriptor    0x28  (0x20=top-left origin, 0x08=8-bit alpha)

Example header: 00 00 02 00 00 00 00 00 00 00 00 00 WW WW HH HH 20 28

Pixel format

4 bytes per pixel: BB GG RR AA
Alpha channel = 0 (black) normally; white = blight.

Color → pathing semantics

Color	Build	Walk	Fly
White (R+G+B)	no build	no walk	no fly
Red (R only)	build ok	no walk	fly ok
Yellow (R+G)	build ok	no walk	no fly
Green (G only)	build ok	walk ok	no fly
Cyan (G+B)	no build	walk ok	no fly
Blue (B only)	no build	walk ok	fly ok
Magenta (R+B)	no build	no walk	fly ok
Black (none)	build ok	walk ok	fly ok

Rule: Red channel set = no walk, Green channel set = no fly, Blue channel set = no build.
Alpha: 0x00 = normal ground, 0xFF = blight.

war3map.wpm — Path Map File (new, ≥ patch 1.30)

Replaces war3mapPath.tga in all modern WC3 versions.

char[4]  file ID            "MP3W"
int      version            0
int      width              map_width  * 4
int      height             map_height * 4

Data

width * height bytes, one per 1/16-tile cell.

Flag byte

Bit	Mask	Meaning (1 = restriction active)
0	`0x01`	Unused
1	`0x02`	No walk
2	`0x04`	No fly
3	`0x08`	No build
4	`0x10`	Unused
5	`0x20`	Blight
6	`0x40`	No water
7	`0x80`	Unknown

Common flag values

Value	Terrain type
`0x00`	Bridge doodad (all passable)
`0x08`	Shallow water
`0x0A`	Deep water (no walk + no fly)
`0x40`	Normal ground
`0x48`	Water ramp / unbuildable ground / unbuildable doodad parts
`0xCA`	Cliff edge / solid doodad (no build + no walk)
`0xCE`	Map boundary edges