how to dynamically upload multiple images for single record?

Is the use of dynamic multiple images in a single record supported? I've searched but have not found the answer. If it is supported, how is it done? I saw 1 suggestion to add a sub-form but that doesn't seem to be the answer. I don't want to add a set number of image fields. Each record would have a different number of images. I want the addition of images to be dynamic.

thanks