The aesthetic appearance of your fabric awning is simple.  You have a look in mind that people will see.  Or  you have a basic size/shape that covers an area needing covered.  How to achieve the look or shape is the important part.  Hire a professional awning company, like us, to come up with your design.  We know how fabric is supported best, and we know how those structures interact with the surface that is going to supporting them.  We also know how to design the frame such that replacing the fabric is not more difficult than it needs to be.  I have seen many frames built by companies that make other things, but claim to also make awnings.  They usually get it all wrong and make future work more difficult.