Clippings/createsprites.c/CreateSpriteLayerGWorld.txt

    // create a sprite layer graphics world with a bit depth of 32
    NewGWorld (&gSpritePlane, 32, &bounds, nil, nil, useTempMem);
    if (gSpritePlane == nil)
    {
        NewGWorld (&gSpritePlane, 32, &bounds, nil, nil, 0);
    }