I’m working on blender plugin which export probes (irradiance grid and reflection cubemap). It is still in progress but it has enough features to be integrated with existing engine.
I didn’t see much stuff about threejs supporting light probes it so I would like to work also on some plugin which extends existing light system with probes. Is anyone is also interested to work on something like this or know existing work ?
three.js has a basic light probe implementation. There is the LightProbe class itself as well as a LightProbeGenerator that can be used to generate a light probe from cube textures/render targets.
There is also a WIP PR by @donmccurdy which adds a LightProbeVolume class.
I think it’s best if you use this implementation as a basis for your exporter since LightProbeVolume can read irradiance data from JSON files. It would be great if your Blender exporter could support the respective JSON format.