example:
https://jsfiddle.net/8u1bfzjm/12/
issue:
The area in the red box keeps shaking
It’s likely caused by z-fighting. When you place two planes / faces very close to each other (and they are facing the same direction) - the renderer may have issues determining what should be rendered first.
Depending on the camera angle the answer may be different - hence, as long as you keep moving the camera, the jittery effect appears.
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https://gltf-viewer.donmccurdy.com/
Put the model on this website, it will not shake, but I looked at the source code of this website, did not find anything special
those thin plates are too close or there’s a modelling error ,
to fix
- clean up the faces in your 3d software (check those golden plates)
- try putting material.side = three.frontside
- try decreasing the camera.far and increasing the camera.near
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