Настройка света...ошибки!

Уважаемые. помогите новичку...хочу добиться хорошей визуализации, пытаюсь по урокам выставить свет, но при рендере вот такие вот ошибки...

RCGI 0.6 warn 362004: no photons stored after emitting 10000 photons from light "PhotometricLight057|Light" (tag a25)RCGI 0.5 error 361053: no photons stored after emitting 1000000 photons from light "PhotometricLight057|Light" (tag a25): canceling emission jobRCGI 0.5 warn 362004: no photons stored after emitting 10000 photons from light "PhotometricLight057|Light" (tag a25)RCGI 0.6 error 361053: no photons stored after emitting 1000000 photons from light "PhotometricLight057|Light" (tag a25): canceling emission jobRCGI 0.3 warn 362004: no photons stored after emitting 10000 photons from light "PhotometricLight057|Light" (tag a25)RCGI 0.5 error 361053: no photons stored after emitting 1000000 photons from light "PhotometricLight057|Light" (tag a25): canceling emission jobRCGI 0.5 warn 362004: no photons stored after emitting 10000 photons from light "PhotometricLight057|Light" (tag a25)RCGI 0.3 error 361053: no photons stored after emitting 1000000 photons from light "PhotometricLight057|Light" (tag a25): canceling emission jobRCGI 0.3 warn 362004: no photons stored after emitting 10000 photons from light "PhotometricLight057|Light" (tag a25)RCGI 0.5 error 361053: no photons stored after emitting 1000000 photons from light "PhotometricLight057|Light" (tag a25): canceling emission jobRCGI 0.5 warn 362004: no photons stored after emitting 10000 photons from light "PhotometricLight057|Light" (tag a25)RCGI 0.3 error 361053: no photons stored after emitting 1000000 photons from light "PhotometricLight057|Light" (tag a25): canceling emission jobRCGI 0.6 warn 362004: no photons stored after emitting 10000 photons from light "PhotometricLight057|Light" (tag a25)RCGI 0.5 error 361053: no photons stored after emitting 1000000 photons from light "PhotometricLight057|Light" (tag a25): canceling emission jobRCGI 0.3 warn 362004: no photons stored after emitting 10000 photons from light "PhotometricLight057|Light" (tag a25)RCGI 0.6 error 361053: no photons stored after emitting 1000000 photons from light "PhotometricLight057|Light" (tag a25): canceling emission jobRCGI 0.3 error 361053: no photons stored after emitting 1000000 photons from light "PhotometricLight057|Light" (tag a25): canceling emission job

...нашла, что это связано с фотонами, но где и как их настраивать не могу найти...подскажите! Заранее спасибо)

Все настройки согласно уроков�http://www.render.ru/books/show_book.php?book_id=958& ;cmt_lg=all&com_start=20#comments