It is a little tricky to take a photo of a painting in a glass front frame. It will give reflections of the objects in the room. Sometimes it reflects your image holding the camera. If you take the photo in a slanted angle with black or dark color cloth on the other side – it does not show the reflection. I can always edit this slanted image of the photo and make it a square view. You may try 2A or 2C. Then I need a photo of 2B for edit purpose.