I believe that that he would still be blind.Kershek said:If he goes gaseous, is he able to see, or does he use the same senses?
I think so.Kershek said:If he is still blind, does he only have 5 feet normal movement when gaseous instead of 10 feet?
A vampire in gaseous form is not invisible - it can be seen like a normal creature.Cordo said:I agree with Camarath. A more difficult question is what if the vampire is already in gaseous form and invisible when a glitterdust is cast in the area. Would it be revealed and would the vampire have to make a will save? Common sense would seem to say no but there is nothing in the glitterdust spell description that indicates it doesn't affect insubstantial objects.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.