How to simultaneously capture images using multiple scene capture 2d?

I placed multiple scene capture 2d in order to take images from different view simultaneously.

But I find that the images taken from different camera are not at the same moment.

There exists one or more frame deviation between different cameras, I don’t know why

So how do I achieve capturing images from different scene capture 2d simultaneously?

Trigger them all at the same time in bp, simple.

I used c++, and put the capture image code in tick function.

And then I placed multiple of them, but the result isn’t correct.