Why render is distorted in mobile?

Lot of objects are getting distorted in mobile preview and even more in mobile device. What could be the problem? How do I solve this?

Desktop version:

Mobile Preview:

Hi!

Check Vertex Count of your model. It should be less than 65k for single mesh. This is a limitation of the mobile system. Try to divide the model into several parts.

https://docs.unrealengine.com/latest/INT/Platforms/Mobile/Content/index.html