Guys, fixing map bugs is a good idea, but there's a gotcha: you'll need a different set of .lits to use with the modified maps (or a smart algorithm that will align the data in the lighmap lump with the original bsp's).
I'm doing some research here () in an attempt to produce an identical (lightmap wise at least) remake of id maps.
The problem is that I don't have the same version of qbsp that was used to compile the maps in pak0/1.pak. The one I have, from qutils.zip/q1tools_gpl.tgz, is a newer version. One obvious difference is that skies are no longer treated as solid. This one is easy to revert, but there must be other changes resulting in different vertex/node/leaf etc counts.
What I'm thinking, by any chance, does someone have an old version of qbsp identical to what id used? It can be identified by the peculiar treatment of sky brushes.
Your help is appreciated
