Not a stupid question at all Daijoobu! I'm tried all possible tricks to blur the shadows. Problem is that Bryce has a raytracing engine and doesn't use shadow maps like Poser. Raytracing renders precise and sharp shadows. Adjusting shadows contrast in the sky editor just decrease the intensity - the shadows stay sharp. When I badly need to soften a shadow, I duplicate the light, offset it slightly and adjust the intensities - the 2nd light being 25 - 50% of the main one. That way you get a softer border but a bigger rendering time. If the culprit light is the sun, create a spotlight with the same color and place it about the same alignment.