Connected Textures for Forge with Rubidium : r/feedthebeast
CTM has non-connected textures on glass. 1.15.2 OF Preview G1_Pre2 · Issue #130 · modmuss50/OptiFabric · GitHub
CTM Optifine - Fabric - Minecraft Resource Pack
Connected Textures] Vertical separators on glass panes do not connect/disappear one block in from the edges. · Issue #3777 · sp614x/optifine · GitHub
How To Get Connected Textures & Glass Minecraft 1.18.2 Fabric Forge 2 Methods!
I made the connected textures for copper, smooth stone, and all the other blocks on this image. These textures works with both Optifine and CTMF (ConnectedTexturesMod Fabric, that works with Sodium) :