Lightmapping Optimization Question

Hi,
I have been trying to create a lightmap for a VR environment but there are certain roadblocks that I couldn't search and find answers for.
I'm baking lightmaps, using Unity's Enlighten and lightmap UV tools. After the bake, resulting map doesn't utilize the whole UV space that I have specified. As you can see in the attached image, all clusters populate near (0,0). What settings can I use to reduce or eliminate this waste?

 

Reduce lightmap size from 4096 to 2048.

 

Thanks for your time and attention.

That solves what I asked but I think my question was flawed. Your solution reduces the atlas size and thus, reduces the negative space.

What I want is to increase the resolution of clusters so I can have a properly utilized 4096x4096 lightmap. I think changing lightmap resolution changes the composition a little bit but I am not sure.

 

There's no "real" solution for what you're asking. What I do is put really fast and bad bake settings (so remove final gather, and reduce indirect resolution) and start upping the lightmap resolution and then baking, (and maybe massage the scale in lightmap values on mesh renderers). Repeat until coverage is pretty decent.

 

Thanks a lot for the help. I couldn't really push those values high enough and complete a bake to see the obvious change in coverage. This really eased my mind about it. Have a nice day!

 

If you look at the bottom of the lighting window, you can see the lightmap count/size update in the first 5 seconds of baking (at least when using Progressive). So you don't need to use bad settings. Just increase resolution until it jumps to a larger lightmap, then make it slightly smaller.