QMC | Internal + External illumination, differently sized GI portals

Now let's put it all together combining external and internal illumination.
There won't be no big surprises here since both scenarios obey to the same rules in terms of having a wider range of light contrast requires a higher samplecount.

GI Bounces: 3, GI-Gamma 2.2, Geometry AA
Scenario: Internal + External illumination, large GI Portals

click to enlarge
With the additional light from the inside we contribute to an evenly lit situation. Internal and external light intensities are within comparable ranges. This leads to a very clean render at 4096 samples.

GI Bounces: 3, GI-Gamma 2.2, Geometry AA
Scenario: Internal + External illumination, small GI Portals

click to enlarge
Though this is a more evenly lit situation than compared to the same scene without internal lights there's much more grain visible here compared to the upper picture. External and internal lightintensities are not within the same range. The external light is about ten times brighter than the internal light which gives shadingpoints a much wider brightnessrange to sample from. 4096 samples are not sufficient to even the noise out. This looks only a tad bit cleaner than the same scene without internal lights.

Phew, that took aaawfully long. Now it's about time we talk about optimization!