does the inside of the 'nest' need some grooves and striations? It just looks a bit too smooth here? Too surgically smooth? Tell me to shut up if you know something here that I don't! :)
I am hoping that once the Harpy is sitting in the nest the inside will be completely covered. If not I will go back and model some groves wherever necessary :)
... in other words 'shut up!' :) But certainly a bit of texture back there would make sense in your otherwise highly textured world.