Map

There are 128 x 128 map-tiles, where each tile consists of 8 bytes.

            .----------------------.
byte 0 - 1  | object info          |
            |----------------------|
byte 2      | layer 1              |
            |----------------------|
byte 3      | layer 2              |
            |----------------------|
byte 4      | layer 3              |
            |----------------------|
byte 5      | unknown              |
            |----------------------|
byte 6      | extra                |
            |----------------------|
byte 7      | read-only tile (?)   |
            '----------------------'

    object info – index into the Ingame Objects Info part
    layer 0, layer 1 and layer 2 – same as in Level/Map
    extra – this determines some extra properties for the tile
        high nibble – shadow (note: only draw the NE wall shadow if there is a wall on layer 1)
            0x1 upper triangle (sprite 75 in data/vblk-0.dat)
            0x2 NE wall (sprite 156 in data/vblk-0.dat)
            0x3 NE wall & upper triangle
            0x4 full tile (sprite 74 in data/vblk-0.dat)
            0x5 full tile
            0x6 NE wall & full tile
            0x7 NE wall & full tile
            0x8 no shadow
            0x9 upper triangle
            0xA NE wall
            0xB NE wall & upper triangle
            0xC full tile
            0xD full tile
            0xE NE wall & full tile
            0xF NE wall & full tile
        low nibble – litter
            0x1 can (3737 in data/vfra-1.ani)
            0x2 banana peel (3738 in data/vfra-1.ani)
            0x3 paper (3739 in data/vfra-1.ani)
            0x4 rat blood (4533 in data/vfra-1.ani)
            0x5 vomit (3741 in data/vfra-1.ani)
            0x6 urine (4542 in data/vfra-1.ani)
            0x7 rat hole NE (3742 in data/vfra-1.ani)
            0x8 rat hole NW