How to use Volumetric Lightmaps?

Could I get a short intro on how to use the volumetric lightmapping included in HIDE? Is it usable or WIP?

In HIDE, I placed VolumetricLightMap instance into my level and baked it. I loaded this level in Heaps and get the following error in console repeatedly:

h3d/scene/Scene.hx:443: Pass volumetricLightmap has not been rendered : don't know how to handle.

I have no idea how to proceed further than this, do I need to use a custom renderer?