title: What format of image?
body: <p><a href="https://mega.nz/#F!uShEGCaC!RmfduG86iC9wpphRUDLojA" rel="nofollow noreferrer">Files Link</a></p>
  
  <p>I have binary image file. Its lightmap.
  I know first 8 byte ist 2 int. Width and Height. 128x128
  Next 4 byte its int value too. But I dont know what exacly. 
  Next ist byte array. At end of file indexes like 1, 2, 4, 5, 6, 3
  I think indexes its for model.</p>
  
  <p>Lightmap always grayscale.</p>
  
  <p>What format of this file or how I can read this binary, how to get know length of byte array?</p>