Here's how I would go about it. Print out the picture you're using as reference. Tape it to your cpu tower or what ever so you can A B it with what you're creating in Bryce on screen. Try to get the size of the printout to match the size of the Bryce working area as possible. You can use a ruler then to check relative lengths on screen with your reference. This should help you to get a fairly good fit when you make your transitional fade between the two.

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy