Integration between software made in Unity3D and 3D party software.

My problem is this:

1. I have a software made in Unity3d that uses some images and videos from 3D models with some levels of obesity.
2. I have another software which capture a real person from 3D scanner and generate those images and videos.

So, I need integrate those softwares. I would like a way to overwrite the images and videos from 3D model in the first software, each time that I execute the second software.

Thanks in advance for the suggestions.