empty render after using radiosity (not sure)

hi all, suddenly I’m getting an empty render (all blue), and camera view shows nothing (having meshed just in front the camera).

I created a new blender file and appended meshes from screwed one and render was working ok, until used again radiosity. Again I can’t render anymore, all I get is a blue screen.

I’m really confused because the camera already was there before using radiosity and AFAIK I haven’t done anything unusual.

any help please?

post a blender file would be the fastest way to solve this. :smiley: