Great profile photos make a great fahz!
Use true profiles (the photo should be taken directly from the side, not at 3/4 view).
- Include the chest (this creates a nicer shape to the base)
Take a high contrast photo with a plain background (a plain white wall works best)
Save at high resolution (a minimum of 2000 pixels across should work. If the photo is too pixelated, the vase won't have smooth curves)