I took the first pics with daylight, in the same conditions than now. The difference is the camera. My Cybershot is 2003 year technology. In interiors and with no-direct sunlight, colors granulates. That don't happen with Nikkon D40, and with other modern cameras. Check this example, zoom-in applied (click pictures to enlarge):
Sony Cybershot DSC-P93:
Nikkon D40:
Both pictures was shot last saturday.