Depending on the size and complexity of the picture, and the size that you are re-creating it, this type of project can be considerably faster than the old-fashioned oil painting or watercolor, and may be more impressive to certain groups of people. Digital art buffs are become more and more the norm in the art world, and this genre is helping to get people into something they may have otherwise ignored, all because of how it was created.
This will show your Angel Investor that you indeed are a rational thinker and concerned about the money as well as the truth. If the Angel Investor cannot trust you your chances of being funded are nil. An angel investor is betting on the jockey not only the horse. As an entrepreneur you must be honest with yourself as well as your financial partner. They want to make sure you believe in what you are doing and that you also have risked your own capital, time and energies into the new business. Angel investors want you to succeed and often they also like to give their input and if you end up taking their money for your startup, the need to realize that their input needs to be taken seriously.