Best time to get a 3D ultrasound ???!

I’m 25 weeks and I made an appt for 29 weeks to pay for a 3D ultrasound but I just read that the best time to get it is 26 weeks?? Has anyone had one and how far alone are you? I’m gonna change my appt to next week probably instead when I’m 26 weeks I just want to make sure she’s gonna look cute in pictures and ready for a 3D. Im 26 weeks this Saturday so I’d be 26+ a few days if I made it for next week