Spoiler (click to show/hide):
So the futa standing up is drawn from imagination. While the sitting futa is copied from a doujin(i.e. I looked at the image and did my best...)
As you can see the copied one is much better. I have the guide for shading, limbs, face and whatnot.
The standing futa was about three sketches before that came along, all done in the same place. So it is messy, not to mention I re-drew every part at least twice. The head and hands(I wish I drew her hands behind her back now.) I kinda gave up on, though I like the left eye.
I quite like the sitting futa, I messed up in various place as usual but whatever. I reckon if I actually had some skill in gimp/photoshop I could clean them up to be nice. Or maybe if I took them past the sketching stage. Still I am quite surprised my first attempts to properly draw a female form turned out so well.
In case you were wondering, this is also the first time I really drew clothes. Harder than you think to make them obviously clothes but still clinging to the skin.
I also forgot to mention DTiberius is a cool futa artist, though he seems to be only doing random pages now. Unless he is secretely doing comics for paying people...