For example: you have a 5mx5m mesh plane that has a 5x5 division resulting in 50 triangles that are all using the exact same material (which then would be considered one surface). Now using a pick based on mouse position on the mesh, how would you determine what vertex your mouse was over? I do not see a GetVertex() or GetTriangle() that could allow you determine which vertex index you are near... and you need this vertex index to be able to get/set the vertex position, color, etc..
Unless I am missing something obvious, it appears theres a command missing in the wiki?