Free sprites for Terraria mods and resource packs

Terraria sprite sizes and layout

Pixel scale

2x (each art pixel is 2x2 in the PNG)

Animated NPCs and items

One column, frames stacked top to bottom

Frame height

Sheet height / frame count, equal for every frame

tModLoader texture

Same name and folder as the class (MySlime.cs + MySlime.png)

Resource packs

pack.json + Content/Images/NPC_1.png and so on

C# (tModLoader)

public override void SetStaticDefaults() {
    Main.npcFrameCount[Type] = 4;
}

public override void FindFrame(int frameHeight) {
    NPC.frameCounter++;
    if (NPC.frameCounter >= 8) {
        NPC.frameCounter = 0;
        NPC.frame.Y = (NPC.frame.Y + frameHeight) % (Main.npcFrameCount[Type] * frameHeight);
    }
}

Add a gallery sprite to a tModLoader mod

1. 1Pick a sheet in the gallery. Small enemies and critters at 16x16 or 32x32 are the easiest fit.
2. 2Click Open in Editor and set Columns to 1. Terraria reads animation frames top to bottom.
3. 3Double every frame with 2x in the Pixel Cleanup panel. Terraria art is drawn at 2x, and 1x art looks half size and oddly sharp next to it.
4. 4Export the PNG and name it after your class, in the same folder as the .cs file.
5. 5Set the frame count to the number of frames in the sheet, as in the snippet below.