Yesterday i have done a long walk through a local forest. I harvested resins from pine, spruce and fir trees. I will use these resins for incense in my rites, witchcraft and as offering for Hekate. The resin of these trees have a very nice smell and are a good alternative to olibanum resin (the olibanum trees are on the way to become extinct). I harvested a whole bowl of resin and consecrated it on my Hekate shrine in the night.
Where Three Roads Meet... 
I know you live in Germany and i live in Pennsylvania USA which are about the same latitude. I have seen my evergreens weep resin. Is that when you collect it in the spring? I assume also it just dried naturally in the sunlight or do you dry it quicker?
I collect the resins through the whole year when it is needed. I use the resin that is already dry on the trees and just cut it with my knife. But i am careful to not cut to deep so that the “wound” of the tree will not begin to build new resin again. So i will not harm the tree.
I need to send you a picture of twig formation I found on my sidewalk. I went in side to get the possum and raccoon food and when came out found this right in my walk path that I just took. My house and property are filled with spirits and such. I have a demon that is a . Watcher and guide since I was little. This was on friday I believe the 7th. The 7th day of samhain. The formation was like in your picks with the three branches