Fuel block fuel for a long time, flame than liquid or solid alcohol more ray of light, cast see more clearly at night!
燃料块燃料时间长，火焰比液体燃料或固体酒精更大更有光芒，晚上施放看得更清楚！
2
Note: This function will return false if you cast a ray from inside a sphere to the outside; this in an intended behaviour.
注意：如果从一个球型体的内部到外部用光线投射，返回为假。
3
This is owing to novelist can haul the fact into another scene and cast totally different ray of light by their skillful lies and lifelike fabrications.