From Si Silicon: Alrighty! So I've given my 90s CGI setup an upgrade. The Non Principled BSDF node now should look and behave closer to Blender Internal (2.79) materials. The world environment setup ...

You can achieve the same look as seen in the SM64 renders by using Blender Render found inside Blender 2.79 and releases from before. Sadly with the release of Blender 2.8 Blender Render was replaced ...