Thanks for your answers !
I have already different ways to transfer data, a few Go sometimes, but if I needed I could export only the part I need and it could work, don't worry about that. I just wanted to find a workaround to print 3D images of the data quickly with the same camera parameters for all my experiences rather than having just a screen print of such images.
By the way, I also wonder if it's possible to do it automatically with a graphical environment for a large number of images, but I did not start to work on that, so I'll explore that when I need it (my guess is setting the parameters, showing the window, grabbing it and automatically closing it).

I'll come back if needed and I'll continue to check if you have other ways to do it, but I assume you're right when you say it doesn't look the right way to go.

If things get complicated, I'll try Xdummy !