I'm noticing some really ugly shaping in alyson2's thigh and buttocks when the thigh bend approaches or passes sitting position.   The Thigh mesh really collapses and the buttock stretches weirdly.  It also seems to create a bit of deformation around the center of the butt at the top.  

Does anyone else run into this... I havent seen it in any renders, but then I wouldn't post a render that it was evident in either.

I was thinking about trying to make a fix morph for it, but I thought I'd check if anyone else gets it first... I havent heard it mentioned before.

Hmmm...  I was working from a cr2 that I saved to the library myself, with anastasia applied... but starting from a fresh cr2 I dont get the same problems.. at least not with the same severity.  

I do still notice it a bit.  And it is more pronounced with anastasia as she has a bit more meat on her thighs.  For me that nice crease where the thigh hits the hip was sort of u-shaped and the inner thigh was very flattened.  The buttock bulged quite a bit further down as well.  

The odd shaping at the top of the buttock is just the way the weightmaps end without feathering onto the hip group at the back,  I was able to smooth it out fairly quickly.  The inner side of the bottock when bent that way is a little bit angular still, but I dont render a  lot of but-crack shots anyway.  Again this is mostly noticable with anastasia's extra meat.

Quote - Here's an example of the butt crack problem:

So its worse when both legs are bent... it looks like she has an extra.... nevermind...

I adjusted the bulge weightmap of the thigh bend, just with a bit of smoothing up into the hip area to remedy that.  I'm not sure but I dont think it would be a big enough change as to cause pokethrough in clothing, so you could try to play around with that.  Or try to smooth it out with the morph brush

That ridge that you are seeing goes all the way along the rear inner thigh and I wasn't able to compensate for it lower down without causing trouble with other bends or movement.   As I said though.. I dont have a particular need to render her lower but crack so its not much of an issue for me