At the risk of inviting heated debate, we’d say hardly at all. As we said, the main purpose is to break up the outline of an object and prevent reflection. Obviously, an arctic terrain camo will stick out like a sore thumb in the forest, and vice versa, but as long as you’ve got roughly similar patterning to your surroundings, it should do the job you need. Don’t discard used tape in the field. It might be harmless to you, but it could trap or choke birds and small animals. Take it home and put it in the trash.