Jerry, I would say yes, but only for a light duty pack.
I made a backpack-style rope bag for my climbing rope using thru hiker 3D mesh in the shoulder straps, stitched right-sides together with a thin coated nylon, then inverted and topstitched (ie no foam inside). I think it works well enough there (carrying ~10 lbs 30 min to the crag) but I wouldn't use it on anything that was going to be carrying much more than that. You might have success at larger loads using XPac and the 3D mesh as above, since the XPac has more structure, but I'm just speculating.
Once you add foam, there's not really any reason to use 3D mesh anymore.