I consider compositing (using bryce mask render) as something necessary for complex scenes, it got to be allowed. Anyway A real bryce challenge should be 100% bryce, compositing allowed, That's the way I work for every Bryce contest. Then.. when does the Bryce Guru challenge will start... and who's gonna decide of the topic? Another question.. Bryce 5 has metaballs, soft shadows, tree lab... Bryce 4 doesn't.. It should be taken in consideration for the votes. Cheers Pidjy