I’ve already spent hours and hours practicing weight painting. When I thing I am becoming good at it, I can’t solve some basic stuff…
any help, any directions to this problem?.. I don’t know what bones to influence legs to behave naturally…
For a start the pelvis/hip bone should have more influence over the hips. Think of the underlying bone structure, and use that as a guide. Then make adjustments to allow for the clothing.
Something similar to this. The pelvis/hip bone will serve to hold the general shape and volume around the hips and glutes.
Obviously the topology will have an effect on how you approach it too.
Having a good workflow and tackling everything systematically will help. Also, knowing how to “fix” auto weighting and what settings to use and when. I have a few tutorials on weight painting on my youtube channel. I use the Rigify rig, but the setting and workflow tips should be useful for any project. Look for Part 7C through 7E.
Good luck!
Hi Macser. Do you have a tutorial of this model that you just posted. The weight paint It looks very good. I would love to see all bones influence.
I don’t have any tutorials on that particular model, no. It’s the result of playing around with Manuel Bastioni’s character lab. After which I put together a simple rig and bound the mesh to it. Nothing fancy.
DanPro’s actually very experienced with rigging. More so than I. You could learn quite a bit from him. 
I’ve know DanPro tutorials even before I saw him in the forum. Famous
Second that. DanPro’s weight painting technique in which he uses a very low weight (.025) and gradually adds weight, vertex by vertex, until the desired deformation is reach was a real game-changer for me. Gone are the days when I use arbitrary weight values (.5, .25, .1) and hope for the best! Check out this tutorial in particular: