Looking forward for solution to this!

All you had to do was to download blender program (www.blender.org), then when you import fbx file (not obj) you see a lot of objects.
The instructions tell you which object to see first, so for the first letter of the flag you had to go to the point: (-50, -33, 77) and find the correct letter. Letters were represented as binary strings, but some of them weren't correct so you just needed to find the right one.

https://imgur.com/a/4WAqU

this was half guessing half useless, no security in that

@terjanq, ah, FBX, I see. Thank you <3.

How to start playing CTF.
I need a tutor please

There was no guessing, you had to determine what type of file is that. I didn't guess anything, all read from the inside of the file where I saw (using strings) that the file was created in Blender and its format was FBX...