Yes well you are a master of using extra lights to accomplish what this shader is doing. Unfortunately, you have to un-learn that tactic. Now that the material is behaving realistically, we find that all the lights you've been using are overkill.

This has come up many times in discussions with many users who are trying to use existing light sets with gamma correction. In particular, a couple users have mentioned overexposure when using your light sets. LOL

Nothing wrong with your light sets for the old way of doing things. But you added lots more light than is physically realistic in order to fill in the areas that looked too dark from Poser. You were basically gamma correcting the materials by shining extra lights on any area that was showing too dark.

But they don't show too dark anymore, so you can shut down a lot of those lights. All the tricks you developed for making realistic looking renders via extra lighting are going to work against you now.

Start simple. Render with only 1 infinite light at 60 to 70%. Then add some IBL until the shadows are no longer black. That's usually all you need - two lights.

I recently posted some lighting charts containing 140 renders. These charts help you pre-visualize how lights are supposed to behave, as they do in real life. Have a look:

http://www.renderosity.com/mod/forumpro/showthread.php?message_id=3440889&ebot_calc_page#message_3440889

 

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)