@BernhardRieder - for run time light evaluation I believe you’re only going to get what you’re looking for with ray traced shadows. From the looks of your renders it doesn’t look like Ray Tracing is enabled as the shadows are too hard and not exhibiting the typical ‘noise’ in a ray traced shadow. I just went through the same experience trying to set up a test case to match yours and found the same result you were getting. I found after following all of the steps outlined in this doc (and re-starting the edtior):
https://docs.unrealengine.com/en-US/…ing/index.html
… then I started getting the real-time feedback for my soft shadow settings that you’re looking for. I believe the key was switching Default RHI to DirectX 12.