I’ll be honest, they already capture the mood you’re talking about. I mean, you could play with the lighting settings a bit more to give it a more horror desolate vibe, but honestly, I love how you crafted the scenes; they’re really beautiful.
You could study other people’s work for scenes that give off the vibe you’re looking for.
You could look at resources that give an indepth explanation to creating the mood you are aiming for.
You can use AI as a resource for inspiration; it’s sadly a really good way to get inspiration from AI; use it responsibly.
Sorry if this isn’t helpful. I tried my best, but I honestly don’t see what’s wrong with your pictures. If you want more realism, then Blender or any lighting software is the way to go, but Photoshop, or any graphic software is also helpful if you just want to mess with the images in terms or lighting.
I am quite shocked that they actually did a school project on Roblox Studio creating a game. Is Roblox already attracting schools to create games already in 2024?