This is embarassing - I was sure I knew how to do this, but it didn't work when I tried it. I want to apply a magnet to certain material zones on a figure: in this case, V3's inner mouth, tongue, teeth and gums. This is what I thought I should do, but it obviously isn't since it doesn't work. I open the grouping tool, create a new group called Mouth. Then I add the materials that I want to magnetise to that group. I thought that I should be able to apply a magnet to this new group, but I can't find how to do it. Maybe my assumption was wrong, or maybe I missed a step. Put me out of my misery, please...