this.span = span;
width = span * Chunk.width;
length = span * Chunk.length;
height = Chunk.height;
queue = new CircularBuffer(width * length * height);
cache = new LightCache(span, span);
tempChunk = new TempChunk[span * span];
for(int z = 0; z < span; z++)
for(int x = 0; x < span; x++)