Hi Gus Downloaded the image and tried to enhance the sunburst but have to do it in camera. Unless you use some sort of filter.
Can play with local contrast and fine tune the clouds Endless possibilities If you do remember to feather the selection When doing the sky I usually feather 50 or more pixels Makes it look seamless !!!!
I am not too good at landscape stuff but just did a quick thing here for kicks. I was always told to pump up the contrast with silhouette shots and maybe even some sunset stuff so i tried it, also cloned out a couple hot spots....this is a 3 min job so you can do better...way better! ;)