Well from a woman's prospective I agree with the tutorials above the breasts in question are to firm, and round looking to be real and if the ladies are moving they are need that movement element added , also I would recommend looking up what different breast sizes look like without bras for reference as well as a variety of ages
Frankly speaking breasts that large if they are real would have some weight to them making them lower on the chest and a bit less round
Sorry if I'm critiquing the boobies to hard or just not making sense or being helpful O////O