Welcome to CTM Refabricated, a port of ConnectedTexturesMod for Fabric which is a port of the ConnectedTexturesMod (a mouthful, I know)
CTM Refabricated allows resource packs to add connected textures, emissive rendering, and much more. A resource pack which adds these effects to vanilla, and some select mods, can be found here.
Note: CTM Refabricated does not support the Optifine CTM format, for that, use Continuity.
In compliance with the GPL license, I state the following:
The original mod can be found here.
This mod was forked from the source code found here.
My changes consist of porting the mod to 1.18.2 and 1.19 Fabric and editing code where necessary to use the updated methods in those versions