Hi! This is a picture showing Barcelona from Collserola heights. As other shots from mine, I'm using a manual blending technique to have a rendering close to the naked eye vision at night. An HDR software doesn't provide me these tones and this type of view, that's why I developed this "manual HDR" technique.
The good point of this technique also is that I can choose which exposure will be the base of my picture. Indeed, here I wanted the longest exposure to be my base to show the moving clouds. This exposure was about 15 minutes and show the whole movement. The white line was Sirius moving during the whole exposure and was cut by the clouds passing in front of it.
Please note at the bottom the two car lights trails :)
It looks to me that the moving clouds are like giant sheets that are covering the sleeping city :)