I've been where you are, and it can be very hard when a child is involved. My exah has been out on the streets, in so many rehabs, and even in jail. I have always tried to help him see our son when it was possible, and when it was impossible for him to come to us. However, I am not responsible to be sure he sees his son. I have left it up to him to make the effort to see him. Where there's a will, there's a way. And even out of rehab and jail, he's sees him sporadically, only when it's convienent for him.
Also, I never sent pictures when asked. Not because I was being petty, but because I felt it's not my responsibility. If he wants to see him, he can come take his own darn pictures.
You will decide what is best for you and your daughter. I placed my son's best interest, and my sanity before my exah's desires/demands. I consented when I didn't feel resentment for the request, and I refused when I did. And I learned to be ok with my choices.
Sending you hugs.