First up......Limiting Exposure to the Sun
Taking doll photos in sunshine can be tricky, especially considering sunshine is not good for resin.
No one wants their dolls to turn yellow or green. In order to protect the dolls from the sun, it's important to keep them covered as much as possible. This is especially important when setting up scenes with multiple dolls. Keep the ones you haven't posed yet in their box, covered by a cloth, or shaded by an umbrella. You can also shade the dolls with your own body as you lean over to pose them...