I am not a mapper by any stretch of the imagination but I can do Photoshop and contribute some minor details here and there. Some samples of posters I've done. These are in .png format but I don't know how to change them to a useable format for mappers. If I have some good feedback, I'll do some more. Always available for custom work. PM me with your size requirements. For reference, these are 300x400 pixels.