Glad you like the project!
If you're just looking for the lighting I highly recommend using the Warudo plugin I made instead: https://steamcommunity.com/sharedfiles/filedetails/?id=3342097641
It's optimized better to use the GPU without slowing down other stuff, as well Warudo is just more efficient at capturing video to work with OBS.
If you really want the reflections on the visor though I think a custom shader would work well. I considered adding the reflections thing to Warudo (maybe it already exists?) but I have never seen anyone actually use the reflections feature of VtubeReflect so I saved myself the work.