Everything is rendering in the ambient color.

When trying to render a still shot of the scene, everything is the color of the ambient color in the World settings. it was working till i added another particle system and now everything is the ambient color


Please if possible can you post a blend file that demonstrates your problem and we may be able to track the issue down. There are just so many possible things it could be without a file to look at it’s very difficult to guess what could be causing the problem.