optimize three.js metallic material.

this is a task for solving problem. we have a project already in [login to view URL], but certain materials like metallic looks still not contrast enough. I am looking for someone who is expert in [login to view URL] and optimize the material according to our purpose. It would be good to have long-tern stable work wise. Metalic materiał should be shiny and reflecting. but the performance should be still fine for web. if anything need to be done in 3d, blender is preferred. project detail picture or link would be shared in private chat.