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cube2equi

Cubemap to equirectangular transformation

Output height and width must be divisible by 8.
if height and width are large respect to the input cubemap, it may leave some artifacts

TODO:

Implement numpy
Implement torch
-Bug on torch where there's a bit of artifacts on the left side when output size is large-
- This only occurs on torch grid sample and not custom, therefore a problem with grid sample