Nature Vector Images. In this category I’m going to share nature related Illustrations. Vector silhouettes of trees, plants, leaves, flowers. Maybe some other natural elements in vector: clouds, roots, mountains, forests. I hopes my free vector outlines will help designers to create good looking & unique graphics. Some nature vectors (for example trees) good because they are abstract by nature and can be used as textures in your designs or as literal silhouettes of trees or landscape.