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I want to flip mesh object across specific axis(X, Y or XY) and I have applied matrix same as referenced here to the mesh object and indeed it is working when I'm using an THREE.ExtrudeGeometry instance.

But I'm rendering thousands of object so performance is major concern therefor I have to use THREE.BufferGeometry to gain good performance but my changes in matrix to get flip object cause the problem. After that objects are not visible anymore.

Is there something that I have to care for THREE.BufferGeometry in this case?

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Priyank
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    Dou you render the meshes from both sides? `side: THREE.DoubleSide` – marcel Apr 23 '15 at 10:57
  • @marcel Its worked. Thanks a lot. You saved me :) Does it make any difference in performance? – Priyank Apr 23 '15 at 11:23
  • yes `side: THREE.DoubleSide` has a hit on performance. a better approach is this one: http://stackoverflow.com/a/21485105/1980846 – gaitat Apr 23 '15 at 12:50

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