-- Create a custom Lighting object local lighting = Lighting:CreateNewLighting()

-- Create a custom RenderSettings object local renderSettings = RenderSettings:CreateNewRenderSettings()

The script uses Roblox's built-in RenderSettings and Lighting services to create a custom GUI with enhanced visual effects. You can paste the script into a LocalScript or Script inside ServerScriptService.

You can use a script to create a custom GUI in Roblox that mimics some RTX-like effects, such as volumetric lighting, lens flares, or advanced post-processing. One popular script for this is the "RTX GUI" script on Pastebin (note that it's not officially affiliated with NVIDIA's RTX technology).