I understand artistic expression as the mark or trace of the emotional state of the artist in their perceptual process of a selection of elements (consciously selected or not). From this point of view...
Digital painting at 147 x 147 cm. made using mathematical procedures and fractal geometry representation.
Zoomable image here to see the details and texture at full size
http://www.closr.it/show/MZNuxa5zLWc
The original is a paper print with handmade acrylic finish for texture enhancement and painting and light interpretation; mounted on panel and polystyrene.
For prints, to preserve the intended level of detail and the overall impact of the composition, a print size about 40'' is recommended (36'' maximum at Saatchi)