Hi Hans,

I normally only ever use Q1 to check for composition then use advanced or Uber, so it is very rare I try Q2,3 and 4.

Q2 does the same on my machine, it constantly thinks and thinks and thinks. I had a guess that the tree branches might be too difficult for the simple Q2 ground shadow routines. I'm probably totally wrong! [:D] Deleting all the trees then allows Q2 to render the remaining scene straight away.

db4tech