Wow, that would be odd. My mother took a photograph of my grandfather in his casket for me and even that was a bit too much for me.
But I think it's worth having a record of these sort of things. Even if you never look at them, at least you know you have them and can see it if you want to.
I did think it was odd but then was discussing with a friend and they said ain't much different that these internet funerals viewings. Que? They have these things? Supposedly they do but he thought it was more just viewing the service rather than a few cameras mingling through the mourners and certainly not of the actual furnace entry.
I remember as a kid seeing a photo of gravestone, somewhere in Edinburgh, with my full name carved in the stone.

Ain't any other surname as ours so I doubt there any other tombstones out there with my name on it. Turns out it was my uncle that I was named after who had died in infancy. I always thought, as a kid, that was odd.