Manually Exposed
The eighth optional photo is found when you make your way inside the barn and after you find the padlocked trap door on the floor. Head up the platform by climbing and pulling the generator like you would have to as you’re trying to open that trap door. Once you’re on the second floor of the barn, head to the other end and you’ll find an owl that you can snap a photo of.
Slideshow
When you make it to the End of the World Vortex Club party, head to the bathroom found next to the VIP list girl and the bouncer. Once inside, you’re looking for graffiti that can be lined up to look like it’s a part of Justin’s (the skater boy) body. This will be the ninth optional photo.
Tripod
Stay at the party and head to the part of the pool with the diving board. Align yourself to be able to see out of the high windows until you see the “photo” option for the two moons outside. Snap the final optional photo in Life Is Strange Episode 4: Dark Room there.