Corona Light, Sphere, Render Perfect different in IR and Offline

[TomG]

If I do an offline render, whether Render perfect is enabled or not in a Corona Light set to Object, Sphere, I get the same results. It also seems to have a lot of fireflies at least in this scene (the free kitchen scene).

In IR though, with Render perfect checked, the light becomes significantly darker and I have to multiply the intensity by about 100. I then get harder shadows, but less fireflies. Results seem the same as offline when Render perfect is not checked.

C4D R19, Oct 31st build.

Offline, Not Perfect
Offline, Perfect
IR, Not Perfect
IR, Perfect
IR, Perfect Intensity *100

[houska]

As for the fireflies, I'd say that they are caused by MSI being turned off.

The light is probably very small, hence less light and harder shadows. We'll need to check it out.

[TomG]

TY! I wonder if the "render perfect" turns it into some "point source" rather than an actual sphere in the IR? I have no idea what it does behind the scenes but it might explain the hard shadows?