Luxar intensity → a scalar color. With vertexColors on, three's base colour is color × vertexColor, so a scalar color is exactly a gain on the authored colour — the same thing uIntensity is on the house shader.
intensity
color
vertexColors
color × vertexColor
uIntensity
Luxar
intensity→ a scalarcolor. WithvertexColorson, three's base colour iscolor × vertexColor, so a scalarcoloris exactly a gain on the authored colour — the same thinguIntensityis on the house shader.