VertexColorMaterialIsSolidColor Property

When true (by default), then this material is rendered with colors that are specified in the PositionColors or in the Mesh's VertexColors without any shading produced by lights. When false, then the material is rendered with shading produced by lights in the scene and by using SpecularPower and SpecularColor properties.

public bool IsSolidColor { get; set; }