Second to spheres, boxes are the second faster primitive shape in a typical ray tracer. The intersection routine for a ray and a sphere involves taking a square root. Intersection with boxes do not require any non algebraic operations, but they have a lot of jumps, and jumps in code are expensive.
When specifying a box shape, you must provide a pair of points of one diagonal:
In this variant, there's no need to group coordinates between brackets:
Primitive boxes are always aligned to the axis. If you need another orientation, you must use the rotate primitive with the box. You can also apply a scale operation to the rotated box. Note, however, it doesn't make sense to scale a non-rotated box, since the same effect could be achieved with the box primitive.
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