I've read both the Sunlight simulation as well as the suggested tip, but I don't think my problem is related to light sources.
Even when I add a light in the middle of the room, the render remains black.
Any thoughts on what may be causing this?

<t>I'm trying to simulate sunlight in my living room throughout a day. So yes, I'm taking a viewpoint in the room, but looking out through the (large) windows into the garden outside.<br/>
<br/>
If I add light sources, it'd influence lighting in the room, while I'd like to simulate only sunlight.<br ...

<t>Somehow my brand new Dell XPS 15 with Intel UHD Graphics 630 seems unable to render either a photo or video at quality level 3 or 4 and only produces black images or video.<br/>
Since I don't believe SH3D is able to leverage my GeForce GTX 1650, I don't think that's very relevant.<br/>
<br ...