public Material(float kreflection = 0, int specularK = 10, float kdiffuse = 2f, float kspecular = 0.5f, float emission = 0f)
 {
     UvProjection = ProjectionMode.SolidColor;
     Color        = Colors.White.ToVector3();
     SpecularK    = specularK;
     Kreflection  = kreflection;
     Kdiffuse     = kdiffuse;
     Kspecular    = kspecular;
     Tiling       = new Tiling();
     HdrImage     = null;
     Emission     = emission;
 }
 public Material(HdrImage bitmap, ProjectionMode projectionMode, Tiling tiling = null, float kreflection = 0, int specularK = 10, float kdiffuse = 2f, float kspecular = 0.5f, float emission = 0f) : this(kreflection, specularK, kdiffuse, kspecular, emission)
 {
     UvProjection = projectionMode;
     HdrImage     = bitmap;
     Tiling       = tiling ?? new Tiling();
 }