What other 3D apps? That is why they can say that. They are often compared with Bryce, who does not have such a system. Now if they said, not found in other 3D apps like World Construction Kit, then there could be something said. It's maybe a little misleading, but it is the truth as there are 3D apps that do not have an ecosystem. It's like when 3 radio stations claim they are number #1, which is true, but in different age markets (but they forget to mention that part).