Thanks for that. #47 can we flip one side, so that it looks more like a sun and less like wings. Maybe even extend the circle behind the windmill with an opacity gradient.
and a bit more definition in the turbine. Possibly through shaping, shading, or both.
They have subtle curves that help catch the wind, and also a taper into the hub, which is attached to a cylindrical tower:
http://www.global-windpower.com/images/photos/rotordrop.jpghttp://www.renewableenergyworld.com/assets/images/story/2006/8/21/1332_Siemens_ravensberg2.jpghttp://www.global-engineering-technologies.com/images/wind_turbine/1.jpg