What does the "Pack Quality" option do in the Lightmap Pack settings box? The option's tooltip says Pre Packing before the complex boxpack.

Lightmap Pack options


1 Answer 1


Packing quality controls how efficiently laid out the UV islands are on the texture.

A low pack quality means there is more texture space wasted (but faster unwrap), a higher value means the UV islands are better optimized to use the entire texture, at the expense of unwrapping time.

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  • $\begingroup$ It seems to be very quick regardless of quality. Why don't they just hardcode it at 48? Is there anything else it affects, such as stretch? $\endgroup$
    – Keavon
    Jul 11, 2014 at 22:37
  • 2
    $\begingroup$ The speed differences will only show up when you are unwrapping models that have a lot more geometry than you see in the example Mike shows. Basic scenes usually process quickly no matter how slow the algorithm. $\endgroup$ Jul 12, 2014 at 12:02

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