Spectral environment maps

[jussihh]

Is there support for spectral environment maps? E.g. implementing support for EXR files in Fichet et al. layout would be great.

Alban Fichet, Romain Pacanowski, and Alexander Wilkie, An OpenEXR Layout for Spectral Images, Journal of Computer Graphics Techniques (JCGT), vol. 10, no. 3, 1-18, 2021
Available online [http://jcgt.org/published/0010/03/01/]

[njroussel]

Hi @jussihh

Our envmap is compatible with spectral variants. But it does expect the input Bitmap object to use our spectral upsampling representation.
So you would either need to convert your EXR file to this representation or add support in the envmap for another type of spectral representations.