Has seemed vs seems vs seemed?

Hi, everyone.

Could you tell me which one of the following sentences is more correct?

When you step into the real world, you realize that it is very different from what it has seemed from the outside.

When you step into the real world, you realize that it is very different from what it seemed from the outside.

When you step into the real world, you realize that it is very different from what it seems from the outside world.

Thanks!