MultiMesh does not change color of instances

[curly-brace]

Operating system or device - Godot version:
windows, e8192d4

Issue description:
i'm using this code

    var mm = MultiMesh.new()
    mm.transform_format = MultiMesh.TRANSFORM_3D
    mm.mesh = test
    mm.color_format = MultiMesh.COLOR_FLOAT
    mm.instance_count = 1
    mm.set_instance_color(0, Color(1,0,0,1))
    var mmi = MultiMeshInstance.new()
    mmi.multimesh = mm
    add_child(mmi)

but it changes nothing at all
actually there was the same issue for 2.1, but it was not confirmed for 2.1
#5565

Link to minimal example project:
https://www.dropbox.com/s/qn6nhhjs60n0m1x/multimesh.zip?dl=0

[kubecz3k]

I'm able to confirm in 6efd777 build

[henkz1]

There's no bug. The color is vertex color so you need set vertex color->use as albedo in your SpatialMaterial to see any change.

[kubecz3k]

@henkz1 wow you are right! Thank you very much! 🍺
I was putting some time recently into looking at MultiMesh code because of this issue recently :)
I'm attaching working sample for anyone interested:
multimesh_color.zip