Value and saturation are not constantly related. High saturation yellow has a high value. High saturation violet has a low value. Light Is electromagnetic energy of various wavelengths, that are part of a spectrum that stimulates the eyes and produces visual sensations. Natural light, or sunlight, is whole or additive light, whereas light used in painting arts is reflected from pigments and objects and is known as subtractive light.
Texture is the quality of a surface.
Phrases like coolness of stone or softness of skin only enhance this word. The texture of the actual surface of the work of art. Sculptors and architects deal with this as in wood or stone. Painters deal in this form. The appearances of depicted objects differ from paper or canvas.