The blue shadows (also visible in mine) are from the fact that several of the lights represent the ambient "sky" light we recieve. It results in an "evening out" of the primarily yellow sunlight The shdaows 'are' pretty crazy in those images. The lack of a yellow light,?, in pic 4, is what is making the ground shadow blue? I dont quite understand. Or does the plugin 'change' the shadow color (document) when using the light-presets?