- 	Scene graph
    - 	Transform nodes and joints ( lookat, matrix, rotate, scale, skew )
    - 	instances: camera, controller, geometry, light, node 
    - 	Multiple object instances
	
- 	Geometry   
    - 	Mesh: 
	    - 	POSITION, VERTEX, NORMAL, TEXCOORD (multiple also), COLOR, 
	      	GEOTANGENT, GEOBINORMAL 
	    - 	POLYLIST, POLYGONS (also with holes) or TRIANGLES

- 	Materials / Effects
    - 	Texture and color materials
    - 	Materials Phong, Blinn and Lambert (nvidia viewer can‘t show)
	- 	cgfx shader

- 	Animation
    - 	Rotation / Transformation
    - 	Sampled animation
    - 	Expressions
    - 	Animation clips
    - 	Shapes ( Mesh, Cameras, Lights, ...)
    - 	Skin
    - 	Morph
    
- 	Instances
    - 	Visual scenes
    - 	Geometries
    - 	Materials
    - 	Effects
    - 	Animations (clips)
    - 	Nodes
    
- 	Cameras
	-	optics (orthographic or perspective)

- 	Lights
 	-	ambient 
 	-	directional 
 	-	point 
 	-	spot

-	Controller
	-	Morph controller
	-	Skin controller

- 	Deformer



