Seamless glass (No optifine required) Minecraft Texture Pack
M-G-P Texture Pack | Minecraft PE Texture Packs
My texture pack new door and glass texture. Follow me so you can download it if it's ready this is for minecraft bedrock but you can convert it to java I think. :
Clear Glass [Connected Textures] - Resource Packs - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum