So, I only found this out just now, but there is a new Asset released on the Asset Store. https://forum.unity.com/threads/bakery-gpu-lightmapper-released.536008/ It is called Bakery, and it is a GPU Lightmapper. I am definitely shocked that one dude got this done while the official Unity GPU Mapper is still...well to be on its way. I am not trying to promote the asset or anything but just wanted to share the news because I know that a lot a people are interested in GPU Lightmapper. So far it seems good and fast enough but it is still early and there are some few drawbacks (it doesn't support directional lightmaps yet and is only for nVidia cards.) The dev seems to be active so I am not too worried. So, coming back to the GPU lightmapper of Unity, can we have some information about its development progress?