First-your First (!?!?!) portrait quilt is Amazing! Second-and for the record I have no personal experience-I have watched several interviews of accomplished portrait quilters and they all talked about the different effects you get with different types & colors of tulle, and all seemed to use it, at least partially, on most of their portraits. Sounds like a trip to a store with many color choices would be a good idea to at least see the different effects you get, for future quilts if you decide it's not what you're going for with this one. You have a great talent for portrait quilts!