Casting Shadows

Questions
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#1 
     ...
     temple = new THREE.Group();        
     temple.add(plinth);
     temple.add(ramp);
     ...
     temple.castShadow = true;            
     temple.receiveShadow = true;

It seems that .castShadow and .receiveShadow are not properties of a Group despite
a statement somewhere that the properties of Groups are the same as those of Objects.

Am I correct here? And do I have to use Object and or .merge?

#2

Object3D.castShadow and Object3D.receiveShadow only affect the own object but not its children. If you want that all descendants of temple cast and receive shadows, you have to do this:

temple.traverse( function( child ) {

    child.castShadow = true;
    child.receiveShadow = true;

} );
1 Like
#3

Thank you, That works. One day I might understand how.