Hello Grafíx,
I was unable to reproduce the that you are describing. I was able to refresh the material on the sky box by clicking the highlighted field in the following picture (can be found in the details panel after selecting the sky_sphere). This updated the position of the Sun for me.
I noticed that you mentioned the “Refresh Material” check box in your first post. Are you saying that this does not update the position of the sun when clicked?
