HMP 
{
  12B: zeros
  4B float: always 0x3f000000 (0.5)
  4B float: terrain height scale 
  4B float: always 0x3f000000
  2B int  : tile count
  2B int  : terrain texture count* (see foot note) 
  4B int  : offset to tiles
  4B int  : offset to lighting data
  2B int  : width in BLK
  2B int  : height in BLK
  array[width * height] of 2B int: tile indices 
  xB Lighting Data
  array[tile count] of TILE 
  2B: zeros
}

LIGHTING DATA
{
  4B int  : light and shadow object count LSO (includes terrain global light object)
  40B     : terrain global light object
  array[LSO - 1] of Light/Shadow object ("Minus 1" becuase first light object is always terrain light)
}

TERRAIN GLOBAL LIGHT OBJECT [40B]
{
  4B terrain shadow color (8bit per channel RGB, last byte is always 00)
  4B World object light color (8bit per channel RGB, last byte is always 00)
  4B float terrain light color and intensity red channel      |
  4B float terrain light color and intensity green channel    |---seems to be based on a max 255.0f convention, can be
  4B float terrain light color and intensity blue channel     |   pushed higher but doesn't seem to do anything
  4B zeros
  4B float terrain light direction vector X |
  4B float terrain light direction vector Y |---always normalized
  4B float terrain light direction vector Z |
  4B zeros
}

LIGHT/SHADOW OBJECT [32B]
{
  4B float    light color and intensity red channel   |   based on the same max 255.0f convention as terrain light.
  4B float    light color and intensity green channel |---In light mode higher values = brighter light
  4B float    light color and intensity blue channel  |   Shadow mode is inverted, higher values = darker shadows
                                                          but the inversion also extends to the shadow color (i.e if you
                                                          want to make a blue shadow you would need to set the blue 
                                                          channel to 0.0f and the red and green channel to 255.0f).
                              
  1B bool   Actived (0 = deactivated (no light or shadow), 1 = activated (present light or shadow))
  1B bool   Light/Shadow mode (0 = Light mode, 1 = Shadow mode)
  1B bool   Intensity booster (0 = Unboosted, 1 = extra bright/extra dark depending on light/shadow mode.)
                                                  Negates color inversion. i.e if you want to make a blue shadow with this option enabled you would
                                                  need to set the blue channel to 255.0f and the red and green channel to 0.0f. Brightness is
                                                  unaffected->higher values = darker shadows)
  1B unknown
  
  4B float  Location X
  4B float  Location Y
  4B float  Location Z
  4B float  Light/Shadow size XYZ
}

TILE [30B]
{
  2B int: texmap idx (from tex file)
  1B int: ?
  1B int: lo - minimum height in tile (probably for terrain LOD? clipping?)
  1B int: hi - maximum height in tile
  array[25] of int8: 5x5 height values
}

*terrain texture count* foot note - Some levels contain tiles with an animation for a texture. This animation consists of multiple textures, or "frames" for the animation. However each animation counts only as 1 towards the terrain texture count. An example of an animated terrain texture is a tile that is textured to look like water.