Villager names shows from too far for me. Its expecially noticeable with Stonehelm, when you can detect village through ground.

Is it config files and I'm blind? Will be perfect to decrease distance or hide names when they are behind walls.

It's not possible to decrease the distance/hide names because that is done on the client side of Minecraft, where this mod is a serverside mod. However, you could turn off the nametags from a distance using NameTag Names. This makes it so you will only see the villager's name when directly looking at them.

Thanks. It's somewhere in config, right?