I have recently installed a new iOS image editing app called Apollo: Immersive Illumination. It enables you to add in extra lighting onto your photos using the depth information that Apple creates in Portrait mode images.
It’s a remarkably simple concept but is a little fiddly to get right. You can add multiple light sources onto different areas of the image. The software knows from the depth information which parts of the image will be lit by this new sources and adjusts the highlights and shadows accordingly.
You can create some very dramatic variations of your existing images using it. Here are a couple of examples I’ve done recently:
I’ve inserted some Flickr images here but used the ‘large’ size direct URL using the normal image embed, rather than the Flickr embed itself. Let’s see if these images correctly align.