So I just downloaded Nikisatez's BDay Dress from this site.
Link: https://zonegfx.com/bday-dress-v4-a4-g4/
I can put the dress on my V4, but the morphs don't work. Skirt controls, waist size, those things. None of them work. The dress IS 'fitted' to V4 successfully. Oddly, the 'translate' and 'rotate' functions of the dress work, while this isn't supposed to be possible with clothes fitted to a character.
The issue has forced me to use only the standard V4 body model, as any other body shape will clip with the dress. No skirt controls means only a few poses are possible as well. Anyone got any tips? Anyone have this product?