> One could forward declare osgUtil::RenderStage and osgUtil::RenderBin in 
> include/osg/RenderInfo and then allow the current bin/stage pointer be stored 
> in RenderInfo.  User code would need to include RenderStage/RenderBin if they 
> need it. 


Unfortunaly, by doing this, we can't use ref_ptr to store the RenderStage and 
the RenderBin (the ref_ptr template need to know that osgUtil::RenderStage is 
derived from osg::Referenced to compile properly).

Not sure if it is safe to store these pointers as non-referenced pointers.

Cheers,
Aurelien

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