Just Colored Lighting added to a very fast shader for Potato computers, with optional shadows, texture upscaling, and PBR support.
Colored Lights
Normal Preset
Great for a Vanilla feel: Options like godrays to just slightly enhance the presentation
Colored Lighting showcases Normal Maps (Patrix resource pack shown)
Colored Glass tints Blocklight (but it can still sneak around if not enclosed since this is just floodfill)