I know this problem has come up many times befor, i just couldnt seem to track it down. Left work last night and the file was working fine. Got to work this morn and added a few roofes and this is what i got.
warning: Over bright materal, bounding box , blah blah blah…
Im using a standard target Cam and a normal max Sun.
plz plz, this is pretty urgent, the render must be finished by the end of the day (Wed 21 Dec, 2005) . If some one has any ideas please let me know
thanks
Check that u have ticked the apply crop option in every single bitmap.
Look for ward materials in those roofs, or even anisotropy.
Check if u have touched anything under bitmap controls, maybe making some bitmap to go crazy, to extreme values.
And look if u have an object very far away from the others, maybe hidden.
It looks like the problem comes from the material.
If you use lightcache check pure white reflect refract.
check stdmtl and change by Vraymtl if you have.
I this can help.
Not using lightchache. Im gonna check the materials for errors.
What is your exact error message?
Panthon was right, there was some sort of strange material on the grass, one of the guys in the office did somthing wrong. I quickly remodeled the grass area and reapplyed the material and problem was solved.
thanks for giving my brain a jump start that pointed me in the right direction
Cool! 
happy for you