Wings file format specification

[micheus]

I already found out that they begin with the header "#!WINGS-1.0 0D 0A 1A 04 [4 bytes that are probably matching the file size] 83 50"

Almost. The four bytes are reference to the data size - that exclude the header string:

-define(WINGS_HEADER, "#!WINGS-1.0\r\n\032\04")
\r = #13 = 0D
\n = #10 = 0A
\032 = #32 = 20 (??)
\04 = #4 = 04

* The red one is not matching with your value.

If you are able to read the Erlang files you can find all information checking this file: wings_ff_wings.erl