Nameplate threat texture

[Spyro]

Hi guyz.

I want to show and change the color of the Threat Region of nameplates, that texture that glows with aggro changes etc.

Once I have intercepted the nameplate, I get the Threat Region and then I do a SetVertexColor(0, 1, 0, 1) on it and a Show() to show it in green, but when I do it, nothing happens, the texture doesn't appears. I'm sure I get the region correctly (I saw it on LibNameplate's source code). I also get other regions correctly (name, level, etc).

This is basically what I do

local function GetThreatRegion(Plate)
  return select(1, (Plate:GetChildren()):GetRegions())
end
 
TheNameplate:SetScript("OnShow", function(Plate)
  GetThreatRegion(Plate):SetVertexColor(0, 1, 0, 1)
  GetThreatRegion(Plate):Show()
)

Anybody that has worked with nameplates knows why?