Thank you for your feedback.
In fact, I'm more comfortable with Gimp than other 3d tools... so I spent some time in this way & found a solution :)
So the starting point is this one:
I splitted the picture into quarters, and applied on earch vertical & horizontal mirror.
Finally recompose the picture with the quaters...
And here is the rendering :)
Celebration :) Now I have to remove the figures from the quarters
