RECT Light shadow sharpness control

Hello!

I am rendering a bathroom part of a bigger home. The bathroom does not get direct sunlight unfortunately, and I need to use a rect light to show some light from the window. I usually don’t do this as most of my scenes have sunlight, but for some reason I thought RECT light had the option to choose the radius, and softens shadows. Unfortunately It doesn’t, and now my render has an unnatural shadow line. I don’t want to use point light, as it will illuminate the garden scenery. Is there a way to add light shape radius to RECT Lights? I think I remember having the option in older D5 versions.**