Using Blender 2.79: I have a UV Sphere and would like to add objects to the center of the faces.

Following this post it was not a problem to achieve this. But now I want only parts (rings) to be stocked with a specific object and other parts (rings) with other objects. I tried to use vertex groups for that.

The problems I am facing:

• I do not find a way to add objects to just 1 ring of faces.

My approach: If I want 2 or 3 rings coherently I highlight them (faces), apply them to a vertex group and then add a weight of 0 to the outermost edges. This does not work if I only want 1 ring. The objects will be distributed over 2 rings (above and underneath the vertex group edge). I also tried to add single particles to the desired faces in particle edit mode which worked fine but then they where not centered.

I suppose the way I organize my vertex groups is not correct? Would you even use particles for that or recommend another approach?

Anyone? :-)