Finding Reference Material To Supplement Level Design

I’m very new this this forum (so I hope I’m posting this in the right section) but a long time follower (and player) of the Black Mesa Source project. As someone who’s started going through the motions of level design, I’m curious as to where the Black Mesa community finds reference images to help design their levels.

I’ve personally been wanting to design a level based around a nuclear power plant (original, I know), but I’ve been struggling to find comprehensive reference images/videos on the web, any advice?

Apologies in advance if this is the wrong section.

Well, I actually work in a research university so I can just wander around and take pictures of different areas. It helps that I own a shirt that looks very similar to the uniforms the maintenance people here wear.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.