Glower confined to some sort of range boundary?

[Master Bucketsmith]

I've been messing around with light sources in various ways and one thing I noticed was that if you set the radius of a building's glow property beyond 24, the light effect will get these hard abrupt lines where it will just cease to exist.
As if the light is being confined in an invisible box, of different sizes, depending on the set size of the glower.
I can't make sense of where this might be coming from.

Anyone any ideas?

[CannibarRechter]

Hard cutoff in the code? If you follow the code dissassembly instructions, it's not so hard, although you might have to learn a few good command line search tools, and then pause and think about the code you are seeing a bit. Not as hard as might first appear, if you're not a coder; you'll just be slammed by symbolic overload. ;-P

[Master Bucketsmith]

Aw shit. Well, thanks. I'm a McGuyver level coder, so from what you tell me it will probably be a bit above my level at the moment.