Why did they change how it renders but this I mean the following

When I put everything in my scene, I hit  the Render settings button and click the first tab to do a pass render to see what its like, if I like it I hit Render Settings again then actual render the file

Can someone please explain why this is not needed anymore and why if you do it this way it will show the graphic likes not not rendered with the first pass

Why oh why did I upgrade I just did a render and it looks like rubbish.

Angela