I can kinda feel myself losing motivation for this project so I’m posting it in hopes of encouraging myself to continue the work when I get back to my PC. The focus on the DOF is about halfway from the camera to the exit and I want to put something there that emits soft light, but I’m not too sure what yet - perhaps an alien plant that glows?
Let me know if you have any ideas on what to make the subject 
180 sample rate render with 5 light bounces:
Edit:
Just adding an update as I settled on an idea. The image is going to take a long time to render in high quality so here is a 480p version, both natural and denoised:
I’ll be uploading the final version once it’s done!