Materials
A material is the specification of how something should be drawn.
Fields
{
    -- static, 8bit, or doorlike
    type = "static",
    
    -- source texture file
    texture = "image.png",
    -- Sprite sheet start positions
    x = 1,  y = 2,
    -- Width and height
    w = 64, h = 64,
    -- Length / frames
    l = 1,
}
Examples
Simple texture
{
    texture = "hello.png"
}
You can also use just the string "hello.png" as a shorthand for a single texture.
Spritesheet
{
    texture = "my_spritesheet.png",
    x = 2,  y = 3,
    
    -- Spritesheet cell sizes
    w = 64, h = 64,
}
The default texture is tileset.diffuse.png, and you can use it like so:
{
    x = 1, y = 3,
}