If you were being true to real life then the star would look barely at all like any of these. If you look at our sun through a solar filter then what is almost shocking is the uniformity of it. It also has a really crisp edge to it, so much so that amateur astronomers use full eclipses to get the occlusion necessary to photograph the solar flares. These pro astro pictures are using sensors that can determine the sub structure of the suns to give the swirling patterns.
Here is a photo I took of the partial solar eclipse of this year.
http://www.cartographersguild.com/general-discussion/2635-all-canadians-eye-sky.html