objects by Layers

GH3D links:

1. How to get Objects by Layer

2. How to update uuids: open file, select objects by layer, and extract ids

more can be found : Rhino .NET Framework SDK

Bake object to specific layers:

Private Sub RunScript(ByVal obj As Brep, ByVal lay As String, ByVal col As Color, ByRef A As Object)
 Dim lay_index As Int32 = doc.Layers.Find(lay, True)
 If (lay_index < 0) Then
  lay_index = doc.Layers.Add(lay, col)
 End If

 Dim att As New DocObjects.ObjectAttributes()
 att.LayerIndex = lay_index

 A = doc.Objects.AddBrep(obj, att)
End Sub