1 | transparency specifies the amount of tranparency as a factor between 0.0 and 1.0. A value 0.0 indicates that the corresponding shape is opaque and a value 1.0 indicates that the shape is completely transparent. |
2 | Diffuse reflection bounces light off a surface in random directions. Since rays bounces in a random directions, there will be a gentle and diffuse light on a shape without any glints, sparkles and highlights. |
3 | diffuseColor controls the RGB color of the light reflected by diffuse reflection. |