While running on last straight in nordschleife, I was wonder how to make align tree shadows to straight. Finally i found this site and get the right time. I hope it would be helpful for someone who want to adjust sunlights like me. ShadeMap for 37°33'57"N 126°58'42"E Find circuit location and adjust date and time. Result:
I really like that map. The backstory is that the developer created it because he was going to get married and needed to know what the best times were for weddingphoto's.