Unity multicore CPU Usage

Questions & Answers
1

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My Unity is taking hours to “generate lightmap UVS” for some complex models that I have. I’m using a dual core processor and I can see that Unity uses 100% of one core, and the second core is almost free.

As you can see, it’s a multithread process (16 threads), so why Unity is not using the second core?

2

Because the “generate lightmap UVS” function was only written to use one core. The other threads are running other things, and clearly aren’t doing much at that time. Multithreading a process can be quite difficult, and not everything lends itself to that. Some functions such as Beast lightmapping use as many cores as you have, though.