This Resource Pack connects the Reinforced Glass (pane) textures to each other, using the OptiFine CTM feature. The pack has been updated to 1.15.2 and 1.16.1, however Optifine 1.15.2 and 1.16.1 is currently in preview, so it is possible to encounter (minor) bugs with this Resource Pack.
How to use it:
1) Download the texture pack for your minecraft version
2) Make sure that you've installed both OptiFine and SecurityCraft with the right minecraft versions into the mod folder
3) Put the texture pack into the "resourcepack" folder of Minecraft
4) Have fun with your huge reinforced windows that look much better now!
If you have any questions/issues, please use the comment section below.