Not sure if this is a bug, but it’s certainly undesirable.
In the attached file, if you render with the “normal” spot, you get a baseline image. Then turn that off and turn on the high contrast spot. The output shows a dramatic difference between the spheres.
The particle systems are the same except for density. The one has high spatial density, but low opacity. The other compensates, so they should look the same. But offsetting the density by the opacity, we should be able to get the same look.
The problem comes when you have a high multiplier on the shadow density. The two systems no longer match.
- Chad