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COPs: cubemap back to latlong

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i dont't have a direct answer to your question but houdini has a command line utility call isixpack that allow cube to lat and lat to cube conversion :

whatever you do in houdini or vex you will get decent quality but distorsion at the nadir/pole. the best library for doing this kind of work is krpano, almost every HDRI map manipulation tool use this library. it gives great result in term of distorison and blurring.

https://krpano.com/home/

 

For the hard way , this is one of the best place to start  :

http://paulbourke.net/panorama/cubemaps/

https://github.com/madwyn/libcube2cyl/blob/master/src/Cube2Cyl.hpp

 

Edited by sebkaine

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