关于secondary ray bias
有时它对有相互交叉的模型很有用处,如果不使用二次光线偏移,光线就会在两两相交的地方产生黑色斑块,为避免这种情况就可以使用二次光线偏移设置.
(Sometimes it is useful to model intersecting objects. If no bias is used, than Vray marks the intersection black. To avoid this
black artifact it helps to set a secondary ray bias and a bias in the shadow properties of all lights.)
对相交物体模型,二次光线偏移设置与否的对比.
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