Cycles gives weird, blank output image while rendering Render shader mode in the viewport is fine, but when rendering a final image, I get a strange black, blank image with a grainy, blurry light source as the only visible object. Anyone know what might be causing this? I made sure the correct camera was the active one. The strange thing is, the light source in the image doesn't correspond to the locations of my actual light source in the scene.  Here's the render output image: 

And here's a screenshot of my viewport:
The problem is apparently that the camera that was selected under the "Scene" panel was different from the camera that was selected as active in the scene I was working on. The scene that was set to render under "Render Layers" was different from the scene that the "Scene" camera was in, and so this caused it to give a weird, black output. It's been solved. Cycles now gives a normal image output.