I'm trying to simulate daylight coming through a window, like that classic
Vermeer scene on the cover of Computer Graphics by Foley et al.

I can't get my window pane to cast much light into the scene at all. I've
set ambient to 1 for the window and turned off all other ambient values in
the scene, then played with the variables. Is this a clamping problem in the
POV radiosity code, as I've seen mentioned before?

If I play with the POV source (volunteer to improve) is there a place where
I can easily add a capability to increase the effective brightness of an
arbitrary radiator to a value higher than ambient 1? I guess I'm talking
about simulating a very strong area light, which is what daylight coming
through a window is supposed to look like in a radiosity scene.

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