Hi, BB - sorry I didn't get your sitemail, been busy all day. Cunning workaround, though.

I seem to have come up against a problem with the light shader. I don't know if I'm misusing it, broken it, if theres a problem with it that I've discovered, or whether P6 and P7 work differently. Here's my findings, though.

I'm using the Dream Home: Great Room set from DAZ3D, and placing a point light in place for each of the light fittings in the ceilng (there are 11 in total). I decided that I wanted the lights to reach about 50% intensity by the time hte light reached the floor - 128 inches from the light fitting. Here's my results, using your shader:

I'm almost happy with this - I especially like the soft shadows on the walls - but there are a couple of issues. Why is the ceiling so dark, for one? the light traveling upwards from the pointlights at that close range (the lights are actually 8 inches below the fitings, to allow for the ceilng to be lit) should hit the ceilings with approximately 800% intensity. The other question is, if the ceiling is so dark, how can the domed area be so well-lit?

Anyway, here's where the breaking comes in. As an experiment, I thought I'd half the intensity, and double the unit distance - so no the lights are set to intensity 25%, and the distance is set to 256 (twice 128, gettit?). According to the inverse square law, if I understand it correctly, the end results should be the same, right?

As you can see, this clearly isn't the case. The lighting here is much brighter, leading to a hot spot in the breakfast nook wall. So why is this happening?

I do ave both light sets saved as .lt2 files on my computer, so I can send them to anyone who wishes to rplicate my work here. Whilst to truly replicate it, you would need the Great Room as well (which I obviously CAN'T supply), you can check the light falloff within something as simple as a rescaled box, to check this out.

Anyone who can help - whether it be 'BagginsFrodo' or anyone else - would be much appreciated. This is an innovative approach to indoor lighting that deserves to be tweaked and corrected until it becomes a valuable part of our toolkit.

JonTheCelt