It is a side ortho and model is georeferenced.
The model is a building, its altitude is about 70AMSL, with a height of 20m. So 93m should be the top left of the ortho ?
The upper left corner is the reference on Reality Capture.
Solution :
I found a way to have it scaled and at the correct height.
I rewrote the .tfw file as you said, by swapping lines 1 with 2, lines 3 with 4 and lines 5 with 6 and change line 5 with 0 (after swapping lines).
Then when I import on AutoCad Map 3D. I then changed the Y calculated by AutoCad to the number on line 6.
I changed the Y (so the height) because when I was importing without changing parameters. Y was 110m+. After checking, we found out it was just too high by an ortho height. We then checked and found out Y insertion parameter was too high. After changing this parameter with line 6, height was good (crosschecked with topographic survey we did of the zone).
If you have another solution, I’m open to talk.
Thank you for the answer.
Have a nice day !