Quote - Been lurking here with great interest. Now keep in mind I'm wrong a lot (really, you can ask my wife), how I interpreted Bagginsbill's post is that he didn't say anything about increasing ambient to get the brightness back. I read that you should just lower IDL strength to .1 or .15 and see how the render looks.

What I'm thinking is that he is saying that too much of the scene brightness is coming from IDL, and that we should be lowering IDL level, then tweaking the lights for the correct levels.

Doing this with render gamma at 2.2 seemed to result in marked improvements to the test scene, like an improved VSS render.

Anyway, that's my take on it.
Image at
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If you're reducing the IDL intensity and your light balance was otherwise good, when IDL intensity was set at 1.0, then you're surely going to need to add some more light, to rebalance it?

That will either mean increasing the Poser lights... effectively meaning you're just using less IDL, in the overall mix, and more Poser (Infinite, Spot, Point) light.

Or it means increasing the IDL lighting (which might be all the lighting you have in a scene anyway, if you're not using Poser lights).

But that might just be at the level of "tweaks" rather than any more dramatic increase...

Certainly, from my loosely structured experiments so far, it seems that if you divide your IDL of 1.0 by 6.666..., to take it down to 0.15... it isn't then just a case of multiplying the ambient lighting by the same, 6.666..., to rebalance the lighting... far from it.

The increase needed in the lighting, ambient or Poser lighting, to compensate for the reduced IDL, seems to be much smaller than the increment IDL has been reduced by...? Sound right...?

Of course this must be likely to vary, possibly substantially, depending on the scene... I guess.