Ok, so my pics were supposed to be today but got "rained out"

- but I was thinking about this and wanted to get your opinion, ladies!
I read somewhere on the knot about tipping at the wedding. It had a section about tipping your photographer if he or she is not the owner of the studio. Does that apply to your engagement pics too? He will be doing our e-pics and our wedding, but he is part of a larger studio.
Thoughts? what did you guys do?