[AlexP]

Can mxs references vertices have "non standard" color, adding to layer or overriding attributes doesn't change anything, they are always deep blue.

[Mihnea Balta]

Do you mean in the viewport? It's not possible to change the color at the moment, but I can add an attribute which does this if you want. It won't affect the render in any way, just the viewport representation.

[AlexP]

Yes, viewport only, just to be able to see differences between object categories, eg. greenery, buildings, site elements. Most important is that that attribute would inherit color from layer and group