The matter at hand is going to be focused on images that have been changed by over processing and adding things to a render that were not originally in the render.

Brushes & tubes from a 2D editor, Clips from Photos and other images not rendered in bryce, Filters applied to completely change the look of the render.

When you've taken a Bryce Render and Mixed your talents into the image by using other resources and imagery.

I cant Make a Bryce Render, Paste some Photos to it and post that image in the Photo Gallery.

THAT IS WHAT MIXED MEDIUM GALLERY IS FOR!!!!!!

___
Ockham's razor- It's that simple