To see how enters the natural light in a room, we can activate the external brightness of the sky.
A practical tip is to use the rendering property diffusedBounces=0.

Made with the PhotoVideoRendering-1.3 plug-in (PVR-1.3).

Without external brightness


With external brightness (sky with texture)
The number of samples will be increased in the next version of the plug-in to improve the quality.

With external brightness (sky without texture)
Quality is dependent on the value of the rendering property anti.Aliasing.max

In this case, we must find the value that corresponds to the desired quality knowing that the higher the value, the more the rendering will take time.
anti.Aliasing.max = 1
anti.Aliasing.max = 2
At this point, you can keep this value if you double the size of the image and resize it to reduce the noise.

Here is a before/after external brightness using the rendering property globalIllumination=default.





To accentuate the realism, we could add light sources and/or choose the rendering property globalIllumination=path.

Enko Nyito