Enhancing the shadow effects on ThreeJS using buffergeometry

I'm currently working on a project where I have loaded a .gltf model in ThreeJS with a keyframe animation that alters the shape of the object (it's a point level animation). Everything seems to be functioning correctly, except for the fact that the shadow remains constant and does not change along with the object. I've tried using geometry.computeVertexNormals(), but when I implement this, my model ends up being completely black.

If anyone has any insights or solutions to this issue, please assist!

Thank you, Simone

javascriptthree.jsshadow

Answer №1

Forget about calling 

BufferGeometry.computeVertexNormals()
. To enable shadow casting, try this method instead:

gltf.scene.traverse( function ( object ) {

    if ( object.isMesh ) {

        object.castShadow = true;

    }

}

If you want the model to receive shadows as well, make sure to set the property receiveShadows to true.

Also, remember to activate shadows on the renderer, adjust the shadow camera of your light correctly, and ensure that the floor has a suitable material for receiving shadows (not MeshBasicMaterial). Take a look at this example for guidance:

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