How to update rendering upon geometry color/material change?

How does one update rendering upon geometry color/material change? In an older version of Helix, we used to detach and re-attach the GeometryModel3D objects like so: https://github.com/DynamoDS/Dynamo/blob/f0337bd5bd86d5c75571bd7d7d6f45caa4301580/src/DynamoCoreWpf/ViewModels/Watch3D/AttachedProperties.cs#L40.

var geom = (GeometryModel3D)obj;
                
                if (geom.IsAttached)
                {
                    var host = geom.RenderHost;
                    geom.Detach();
                    geom.Attach(host);
                }

I understand that this was probably not the best way to do it performance-wise but any suggestion on the recommended way to do so in the newer versions of Helix would be helpful. @holance?

[holance]

Now you can use VertexColorBlendingFactor = 1 to use vertex color in phong material.

[mjkkirschner]

@holance vertex color as the diffuse color in a Phong Material - exactly! I won’t turn down blending with the diffuseColor 😉 - but I don’t think it is required for my use case.