Question: Kamukha sentence form

Question: Kamukha sentence form
kamukha : [adjective] looks like; ... . I think this applies to physical attributes.
With four sources now, I still only have a 50/50 chance of using "kamukha" correctly (or incorrectly). I don't think that "kamukha" has the reflexive property like a mathematical equal sign (a=b, b=a) although it seems that magkamukha does. It may be ok to compare myself to Brad Pitt but not polite to compare Brad Pitt to myself. So is the Ng phrase compared to the Ang phrase or vice versa?
> a native speaker stated : kamukha niya ang mga magulang niya - he looks like his parents
> TED example : May mga nagsasabi ba sa iyong kamukha ko si Brad Pitt - ... I look like Brad Pitt
> TRG example : Kamukha ng pabrika ang bahay. - The house looks like the factory.
> ETG example : Kamukha’ ni Arnold si John. - John looks like Arnold.
Thanks for any help.