Thank you for trying out Loose Ends! I'm really glad you liked the art, my friend and I really spent time on making the game's overall art direction feel warm with the appropriate color selection!
Regarding your question, I used the built-in shader for UniVRM since the characters we use are created with the VRoid software! I do have Quibli and it was what we used originally, but it was tedious to set up on our character models so we reverted to the UniVRM shader instead. TT
We're really happy you liked the art! We also played your entry and it was absolutely phenomenal too! <3
- Karu