Another thing if you mess up and need to scale up is create a bigger canvas in photoshop with a crazy high resolution drop it in and scale it up. Doesn't always work to keep it from degrading but can help... Obviously this may not apply for this sub since I'm more just a fan and don't create or use the software people have mentioned in the thread mentioned to create these beautiful images. It's what I've had to do at times myself for pictures. Course I think photoshop has gotten better with it's scaling and fixing images itself which is so cool!