>>364382851
If you use lightprobes, it uses XYZ coordinates to calculate what kind of light your object gets.
To make it more performant, not every point on your mesh will be calculated for this, but a very specific point, the anchor point.

If you don't specify a anchor point, the mesh will simply use the origin point. If you have multiple meshes (e.g. head and body) it can happen that the origin point of one mesh is at a different place from where the oprigin pooint from another mesh ist. Because of this, the two meshes get different information on how bright/which color they should have from the lighting probes.
If you define a anchor point (which can also be an empty gameobject parented to your avatar) all meshes will get their light probe information from this one point.