VRML file

	mason_mill.wrl

Converted IGP file

	mason_mill.igp		   9 Objects,  3420 Polygons ->  380 Polygons per Objects

	color merged file

	mason_mill-merge.igp	   4 Objects,  3420 Polygons ->  855 Polygons per Objects

	Note !!!!
	The merge file has no lines


Open GL Performance:

	3D Geometries with increased number of polygons per objects have 
	a better performance.
	A color merge, merges all objects with same color in one objects.
	In general the number of objects can be reduced dramatically.

