Ethereal beauty.
I have two boxes of 4x5 E-6 and might give this a try (I do C-41 at home but have stopped E-6). Did you process for the normal times in C-41 Chemistry? Normal exposure?
I made 4 images - tried to develop as a normal colour film first, but that turned out to be way too much (unsure if it is due to the shutter or due to the developer...)
So this is actually made with only 2 min developing...