@warrenm I remember Aras from Unity echoing @venum_spyder's sentiment several years ago. I also believe it's long-dead.
Does anyone still use normalization cube maps, even on mobile, as described here? http://http.developer.nvidia.com/CgTutorial/cg_tutorial_chapter08.html … Is a sample cheaper than an rsqrt?
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@JessyCatterwaul Makes sense, just didn’t want to go down a dubious rabbit hole without asking first.
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@warrenm This is a very old school technique (used back in the Doom 3 days) I don't think anyone does this anymore. At least not on PC. -
@venum_spyder Thanks for the update.
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@warrenm An rsqrt should be massively less power hungry than texture lookups, and not suffer the memory latency costs. -
@warrenm And, of course, the irony being that a cube map lookup needs to do a rsqrt to access the texture. -
@warrenm (Hmm.. or was it a related function?) Can't quite recall at the moment, but either way, better to not use additional texture ops.
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