Pretty much. It can either:

* Load all the textures at once during pre-load
* Load each texture as it is called/required, resulting in a faster pre-load, but slower full-load

Why, might I ask? Is it still trying to load at that time or something?

Do note that this will result in slight pauses during the first few minutes of playing. For example, the first time you shoot a weapon, you might get a half second pause.

Good to know. But if it screws up gameplay, I might keep away.

PSA: You can make Terraria boot up faster from config.json