It's been widely requested, the optifine free seamless glass pack!

It started when a user named Noatry smartly inferred that it would be possible to make a seamless glass pack using the same techniques I used in my looping logs pack. Funny thing is I had already done this exact thing a year before, but just never thought to post it! Well I dug the old one up, found out it was very poorly optimized, and wrote a whole new one from scratch just to delver the best experience :)

The pack itself is pretty straight forward (panes, blocks, all colors and lack thereof), so onto the download details.
The first download link does not apply special textures, making it the best option if you plan to use it with a texture pack (or if you just prefer the 1.14 glass texture). Be warned it may butcher the texture a bit (hey it's hard to turn 14 pixels into 16 pixels and make it look good!)
The second download titled "legacy" applies textures from before 1.14 (aka developer textures)

Thanks everyone! let's look forward to the release of the seamless gl- I mean grass pack :)
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Follow up: ok admittedly the optifine glass is better, but this is the best vanilla option to my knowledge. I understand glass blocks are a bit weird, and sadly there's nothing I can do about it in vanilla (and my goal with these packs it to keep it in vanilla). The glass panes are where this pack shines. Just wait for the grass pack everyone, because unlike this pack which I designed to attempt to closely mirror optifine's features, the grass pack was designed to replace optifine grass and is nearly flawless