Created a vector drawing mostly in grey hues (as can be seen in the insert at the bottom left), copied separate objects to PhotoPaint and processed them there one by one, using Texture - Plastic, then adjusting tone curve and duplicating layers with various filters. The Texture Effect (Plastic in particular) of PhotoPaint is fabulous; it allows multiple instants with different settings applied to the same object, which results in realistic renderings. The Effect allows to give objects color, shades and highlights. Hues were also adjusted to create a balanced color profile.