I would have to agree with Rochr. Being that Bryce allows import of 2D and 3D material and objects as part of its options, the limit line becomes very blurry as to where Bryce starts and Bryce ends. Some would say that simply using Bryce as the render engine for a scene, qualifies the image as Bryce. To further complicate the issue, should all Bryce scenes that incorporate imports of any kind be slated as mixed medium?