Lines throw the model

[cocken]

I have exported the crafting table and it has like see threw lines. Look at the image. Did I do something wrong or it is a default thing?

[Sphax]

That looks like a bug of Minecraft itself.

You could fix it in Cubik by generating an atlas. Each element would then use its own texture (in one big texture atlas) and knowing each texture would be separated by a padding, the issue would disappear in game.
The final render would be fixed but the final texture would not look like the original one (and could be bigger)