Very good but confusing

I love this app but its very confusing of what the things that start with NA and have a number after it... I thought it was nothing and i left it blank but when i got onto the game, there was so many black squares all over the place, i am sure its supposed to be grass and things like that but im not sure!! Please at least abbreviate the item so my texture pack wouldnt be filled with black squares... It is very frustrating! Thank u for reading, and i hope u change this...

Zeldalover2266 about Texture Creator Pro Editor for Survivalcraft or Survival Craft Skins