A large unprocessed log in the game Processed wood 3D should turn into some kind of product at the finish, but for now you need to carefully guide it along the entire length of the track, on which saws of various types and sizes are installed. Try to cut where the green dotted line is marked on the tree. Before each saw, it will appear, and if not, then it's not worth the risk, but simply go around the saw and move the log further. You have to fill in the bar at the top and then the level will be completed in Processed wood 3D.