I came across an issue where I'm in need of attach multiple bounding boxes to one element, as that functionality is currently not available I'd suggest the following.

• Create multiple bounding boxes within one product and give them seperate titles
• Same as boundingBox property for every element but now boundingBoxes which can have either a boolean 'false' where the element has no bounding boxes and an array type, where the user adds strings of the boundingBox titles or same like the boundingBox property allow to define your own bounding box directly using an object type in that array.

I agree with Ciryk, this is a needed feature.

Agree, need customer to choose either A6, A5, A4 or A3 on one side of the shirt and same for the reverse. Then each size will have its own price. For now i just created duplicated products. HOPE IT WORKS.