Every time I zoom the object looks like this. How to back to its normal?
Anyway, I already solved it. I just clicked some object and pressed F to return it to its normal view, hehe. Thanks to the Unity discussion I found a solution.
is because the camera has a “plane” in front from where it “cuts off” the object. this is automatic depending of the scale of the object you have selected. after hitting F it will focus on that selected object and adjust the clipping plane automatically. Sometimes you want manual control on this if you want to zoom in to see some detail. this forum post has info on how to do it manually