How do you scale client photos for case studies and keep them consistent?

If you add client photos to case studies, HOW DO YOU DO IT? We’re going to be revamping our entire case study page and moving forward want to include a lot more client photos but unsure how to do it? If you have client photos / videos as part of the case study process, I’d love to hear your secrets about scaling this and making them look consistent and not just a lame linkedin headshot. 📸