someone told me this
The solution would be that WireBoundingBox should default to CastShadows = false."
The bounding box is displayed using an Ogre::WireBoundingBox object, which inherits from SimpleRenderable/Movable, which sets CastShadows to true by default. The WireBoundingBox object in scene node is protected, hence not accessible from the outside.
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Take it or leave it. thanks