I see on your website you do landscapes for sale.  In reality, Bryce renders always look 3D (to me anyway - I can almost always tell a Bryce render a mile off!) but if you're wanting a more natural looking render, Vue is the way to go.  Google for tips on render settings.  Often, just using the default settings like Final, Broadcast, Superior or Ultra, you're using elements that may not be needed for your scene which adds unneccessary time.

"Estimated time left" - Vue nearly always lies

Gill