hornet3d posted at 11:09 AM Thu, 11 May 2023 - #4464985

hborre posted at 9:06 AM Thu, 11 May 2023 - #4464977

Actually, looking at some quick renders, it appears that the PhysicalSurface Node emissive properties are already internally set to inverse square or Quadratic.  This is great but if you want light to behave linearly or emit a constant illumination you'll need to use the Material shader I posted above.

One thing I had noticed is that I had to increase the emission strength to get the light to reach in some cases.  Setting the emission strength to something like 50 on the ceiling of a large building such as a warehouse had virtually no effect so I came to the conclusion there was some falloff taking place.  It seems to work much like a area light in that respect.

Could be that the Influence strength needs to be increased from 1 - 7  and not the node strength from 25 - 50 I think this could create a higher color contrast ?!  I am not in Poser atm so can't check. For my emissive light I have quiet different setups also when coloring or adding trans falloff , also want to try creating fire lights that could simulate sun corona on fire, or for simple camp fires.