Yes what you suggested is most intelligent way. How about Tabs Scene -Modeling --Vertex Editor --Spline Editor --Tree Editor --Terrain Editor --Dynamics Editor (clothing and hair?) --Morph Targets Editor -Posing --Bones --Posing Library --Motion Editor --Morph Targets Library and Apply -Atmosphere --GI editor with preview --Sky Editor --Haze Editor -Landscaping --Plant/Tree Library --Wind Effect Editor --Clutter Editor --Leaf Editor -Render --Settings --Multiple CPU/Network Management New Tabs that shares polygons/texture map/shaders/environment in runtime memory to put in Carrara's scene for render -Bryce -Vue -Poser 6 -Amapi -Deep Paint 3D -ZBrush Carrara would have to provide shared memory SDK to outside developers who want to implement their core software in it.