Vector Textures: Create Your Own Grunge Textures
https://www.skillshare.com/classes/Vector-Textures-Create-Your-Own-Grunge-Textures/487588061?
I hate when my designs are looking flat so I always use texture to add life and depth into all my projects. Using simple photos, adjustments in photoshop and image tracing in illustrator, you can create dirty textures that you can reuse over and over again. These types of textures work great for logo designs, T-shirt designs and even illustrations.