rerogue/doc/file_hmt_spec.txt

4B material entry count MC
4B offset after material entries / offset to textures
MC * material entry (36B)
{
  2B int material/texture type: 
      1 - material with texture
      2 - material without texture
  2B int texture index
  4B float (misc)
  4B float (1.0)
  4B int zero
  4B int 0x0A
  16B name
}
4B int texcount Tc
TC * texture entry 52B
{
  4B int pixel offset
  28B zero
  4B int palette offset, 0 = no palette
  4B int texname offset
  2B int width
  2B int height
  8B texture format {
    1B int : always 1?
    1B int : bits per sample?
    1B int : subtype:
       -0 - palette 16x3B RGB, 4bit per pixel
       -1 - 256x3B palette RGB, 8bit per pixel
       -3 - RGBA 32bpp
       -4 - greyscale, 4bpp
       -5 - grayscale, 8bpp
    1B int ? 0, 0x40, 0x80
    4B RGBA transparent color?
  }
}
TC * texture data
{
  16B texname = material name
  xB RGB palette
  xB pixels/samples
}