To make the color work (the grass is automagically colored) you need to turn the green portion of the side texture to greyscale AND add an alpha channel that knocks out the soil portion. Then it works fine.
FYI, there is a tiny bit of emission in the texture that is glowing. It's only in spots of the texture, and it's about half brightness, at that. It barely glows when you are near the block with that texture.
To make the color work (the grass is automagically colored) you need to turn the green portion of the side texture to greyscale AND add an alpha channel that knocks out the soil portion. Then it works fine.