BVH4 order box hits back

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(L) [2016/02/06] [martinradev] [BVH4 order box hits] Wayback!

Hello!
In a normal BVH (2 children), I can find out the closest hit by just comparing the 2 hits. However, with a BVH4 (4 children), I cannot just go with comparisons. I have seen some masking approaches where they consider the split axis.
Could somebody explain?

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