1. Some find that untreated dry leaf produces unnoticeable or only light effects . 2. Why did artists depict some kinds of light effects but not others? 3. The light effects and optical illusions generate immaterial architectures and fantastic depths. 4. They include a variety of light effects , and an innovative treatment of landscape. 5. Additionally, areas near completed puzzles will emit sound and light effects . 6. All those black-light effects , bright colors, airborne acrobatics and familiar stories. 7. The play was performed in the evening, with electric light effects . 8. The sound and light effects include animal calls and a simulated tropical rainstorm. 9. The multimedia installation is rounded off by special coordinated light effects . 10. His paintings are characterized by a bold treatment of light effects .