Merge 3d models from script

Hi guys!
I’m new of Unity development.
I would know how can I merge multiple 3d models into a single model.
I have a library on disk with multiple models and I would join them on the surface of a sphere.
Can I also change their dimensions (x,y,z) by generating them randomly (Math.random).

Thanks in advance for your help! :smile:

Thanks for your reply!
I read it but I didn’t understand what code I have to write…
For example:
I have (on disk) a 3d model (a mountain) and I would merge it with a plane like what I can do in any modeling application.
A video explanation: http://www.youtube.com/watch?v=40glxZCyPeY
Can I?
And how can i modify (from script) the dimensions of the model? And the coordinates where apply it?

Thanks you a lot!!!

Merry Christmas!