This property will force this material to draw earlier or later in the draw queue. Positive values make it draw later, negative makes it earlier. This can be helpful for tweaking performance! If you know an object is always going to be close to the user and likely to obscure lots of objects (like hands), drawing it earlier can mean objects behind it get discarded much faster! Similarly, objects that are far away (skybox!) can be pushed towards the back of the queue, so they’re more likely to be discarded early.