Scene Converter Question

Dangerlad

David Brinnen and/or Horo:
I have a question. I was using the Hybrid Scene Convertor to create a pseudo HDRI background for a Bryce scene I'm working on. Basically the SC scene is the Custom Star field and a large sphere with a picture texture of the moon on it. I have turned the atmosphere off and I'm lighting the sphere with the Bryce sun. The thing is when I render the scene I get a very large white blob in the upper left corner of the render. I am attaching the render along with the setting I'm using. I would like to know what may be causing the blob (actual it is more circular than blobish) and how to remove it. At the same time when I use the created HDRI it does not appear to affect the scene I'm creating.

Dangerlad

One more screen capture

Horo

I'm at a loss. I don't know what it could be but it won't be in the HDRI because it is at the corner of the angular map and it disappears when loaded as HDRI.