Custom Map Makers

In the lighting stage of a compile, what does the -super do? I notice that it has a number that can be set, but the default options in Radiant and Q3Map2 all use -super 2.

-super <N>
Enables arbitrarily ordered grid supersampling of lightmaps. This is much, much, much slower than -samples, by the way.

I didn't understand very much of that...

-samples 99? I bet that would take days to compile. I don't see very much difference in those pictures, but I think I will go with -samples and use a number around 12-16.

I'd say probably 5-8 is what your aiming at

There is a huge difference in those screen shots.
Higher samples values create blurrier shadows, personally I'd never go above 4, i use filter and samples 4 to remove jaggy edges.