Thanks, rest assured all credits will be properly added :) And thanks to you I was able to maximize my concentration on the topic at hand, out of all the PSX-tagged assets yours were the only ones that actually ran on low-end hardware :D
Viewing post in PSX Industrial Environment Asset Pack comments
I’ve been posting my findings in devlogs and as it turns out an atlas texture gave no visible improvements, to my surprise. Scaling down textures had no impact either. The only other thing I haven’t tried is LODs which will have to be made by hand for Godot 3 as it doesn’t generate them automatically AFAIK