Considering some of the wall furnishings out there, it seems that despite a very medieval feel, the actual styles of art are far more advanced, with psuedo-modern techniques (AKA SE model makers are lazy and used photoshop filters on screenshots *cough cough*). Some of the painting suggests that we at least have Oil paints, as well as the alchemical knowledge of stained glass making and such.
Paints and such don't need to use rare extracts really; many paints were derived from plant sources, though there are rare shades not easily found in nature, so you could use our alchemy system as well in RP to cause chemical changes in a hue.
As for runes, ICly my character sews minor wards into cloth and has a magical seal for contracts, so hiding one in a picture is far from impossible one would think.
Paints and such don't need to use rare extracts really; many paints were derived from plant sources, though there are rare shades not easily found in nature, so you could use our alchemy system as well in RP to cause chemical changes in a hue.
As for runes, ICly my character sews minor wards into cloth and has a magical seal for contracts, so hiding one in a picture is far from impossible one would think.
