Heres RDNA Morphing Fantasy Gown, with RDNA's Nature 1 for DNA Morphing Fantasy Gown (a $5.00 texture!) V3 is using one of Syyd Raven's Elven female face morphs.
The default gown texture is a very nice formal white silk and lace that immediately makes you think of Galadriel from the Peter Jackson LOTR movies.