equirectangularToCubemap
Converts an equirectangular image to a cubemap.
Return
the cubemap texture
Parameters
equirect
Texture to convert to a cubemap.
Can't be null.
Must be a 2d texture
Must have equirectangular geometry, that is width == 2*height.
Must be allocated with all mip levels.
Must be SAMPLEABLE
See also
EquirectangularToCubemap