I can not truly create the taste of salty or sweet while awake, but can stimulate some quasi-taste sensation that is weak. In dreams I often do not have a well developed sense of taste with foods being bland often enough or a little blurry if taste can be blurred. I have no luck with smell in dreams at all. I put very great effort into trying to smell things. Only a few times could I smell something vaguely. In one dream I summoned a skunk and picked him up and made him spray on a wall. I did not smell anything despite trying.