Most people rely on Optifine's connected textures feature to have borderless glass blocks and glass panes in their game. But the Glass Without Border texture completely eliminates the need for Optifine to achieve this. And I must say, this pack does even better. With this texture pack installed, glass blocks will have no borders and will have a lot more cleaner and smoother texture. The pack affects all the colour variants of both regular glass blocks and glass panes. The normal, uncoloured glass blocks are now completely transparent and you might not even see it, if it weren't for the white lines that exist solely for detail. Take a look at the screenshots to see what you can expect from this pack.

Download links are given below.

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Glass Without Border Texture Pack