No this is not an incident light meter, this is a gray diffuse sphere probe that you shoot and that gives you the incident light going from all the directions around the sphere (except just behind but if your lens is long enough, this will be a small part). So the idea would be to shoot this probe to get the incident color temperature depending on the direction, and then use this to correct the pictures, depending on the orientation of subject and/or camera.
I would recommend MeshLab (open source and free), Blender (open source and free) and Unity3D engine (there is a free license). MeshLab works very well with RC, and Blender is hard to learn but works very well for baking.