Minecraft escapes from Glp and Paluten. What's the name of the shader, texturepack, mod that links the blocks eg: dirt and cobblestone a little bit?

So with the project Minecraft Escape from GermanLetsPlay and Paluten there's something to stick together the blocks see episode. 47 Time: 7:50 where the blocks connect like the shader, mod or texturespack

I say thank you for the answers.

This is the OptiFine Connected Textures & Transitions addon for PureBDcraft

Thank you so much

: D