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Why my code stops itself after half rotation during animation and I get the waring something related to 'raycaster'. Any idea how to fix it? enter image description here Could anyone suggest the possible mistake I am doing?

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You're probably using a cursor. a-frame cursors use raycasting to check for intersections. The console warns you, that it would be more performant to provide a list of objects you want to be interactable.

You can whitelist objects by providing their selectors (for example by class):

raycaster="objects: .interactable"

For example here you can interact only with objects which class include interactable:

<script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script>
<a-scene cursor="rayOrigin: mouse;" raycaster="objects: .interactable">
  <a-box position="-1 0.5 -3" rotation="0 45 0" class="interactable"
    animation__on="property: scale; to: 1.2 1.2 1.2; dur: 200; easing: linear; 
    startEvents: mouseenter"
    animation__out="property: scale; to:  1 1 1; dur: 200; easing: linear;
    startEvents: mouseleave"
   color="#4CC3D9"></a-box>
   
  <a-box position="1 0.5 -3" rotation="0 45 0"
    animation__on="property: scale; to: 1.2 1.2 1.2; dur: 200; easing: linear; 
    startEvents: mouseenter"
    animation__out="property: scale; to:  1 1 1; dur: 200; easing: linear;
    startEvents: mouseleave"
   color="#AAFFaa"></a-box>
</a-scene>

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