There are actually shapes in many clouds that you see in the sky and you would swear that someone designed then. The truth is that there is a reason for those clouds to be shaped in the way that they are. It is because we created clouds for the purpose of hiding aircraft that are not supposed to be seen by human eyes just yet. This is why we manufacture certain clouds to be able to hide entire aircraft that are huge and others that are smaller. When you see a very thick white cloud it is usually us behind their creation.
If you look up to the sky you will realize that there are many times when clouds are looking too thick and too large and this is when we usually mobilize our fleet from one place to another. We have been doing this for hundreds of years now and we will continue to do it for a long time until you are ready to see this technology.