Transparent Objects

For some reason I have been rendering my renders using Eevee and god knows why, but now I just realised my mistake, so I switch a couple of stuff, set the engine to cycles changed some properties but now I am gonna some parts transparent, any reason why?

Edit: Solved, I accidently had a node on alpha

I’ve removed the tag from your title–that’s what the “optional tags” section is for. :slight_smile: