gb asked about getting _sunlight2 in my modded tyrutils, and I made some progress on that this weekend with more code borrowed from q3map2:
https://runeofearthmagic.wordpress.com/2015/02/22/yoghurt-sunlight/
The second shot is my modified tyrutils using a 200-light dome, and unlike _sunlight2 in bjptools, they're regular additive lights instead of minlights, so you get some nice gradients in the shadowed areas. Also at the same time I added a penumbra feature that splits up the primary sunlight, giving it some nice soft shadows (neither screenshots is using -extra or -soft, light time for my code was around 20 seconds).
Need to polish a few things, write docs, etc, but will have a beta up for this sometime soonish :)