Now I come to think of it, bb once said something like:

"All light probes are backwards. Don't argue with me".

I must find that thread again. Maybe this is why I had to rotate the EnvSphere by 180 degrees.

I wasn't using one of his light probes. Those you get out of his IBL generator will surely be the right way round!

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)