I already own a fully lit, clean-hierarchy Unity environment that runs smoothly on mobile, and now I want it tuned so it feels purpose-built for my Game Assets / Environment Design workflow. What I need from you is threefold: first, polish the lighting and overall performance so the scene holds a rock-steady frame rate on mainstream Android & iOS devices; second, swap in or add new props—buildings, roads, trees, street-lights, general set-dress—so the space matches the look I’m after; and third, adjust the overall layout where useful while keeping the project structure tidy and easy for me to extend later. I’ll supply the original .unitypackage, reference screenshots, and a short fly-through video. The final deliverable is a revised scene file that opens in Unity 2022 LTS without errors, keeps draw-calls low, and stores any new meshes, textures, or materials in clearly named folders. Drop me a quick note with a link to a mobile-optimised environment you’ve built or tweaked and let me know roughly how long you expect the work to take.