This is minor not very high priority.

Currently we only have support for flat skyboxes with a single light value used for the environment.

The replication between Blender Eevee and High fidelity can be matched quite closely if using a flat png texture for environment,

however an hdri skybox would allow for better selection of lightsources from the ambient map as they can be singled out and made to have more oomph, instead of just saying that all light is equally bright.