Here comes the part where Vivo V11 Pro really needs to perform against its competitor, Oppo F9. Phone comes with a dual camera setup, with a 12MP main camera having an f/1.8 aperture with 1.28-micron pixels backed up by a 5MP camera with an F/2.4 which acts as a depth sensor. Vivo V11 on the other hand comes with a dual camera setup of 16 MP main camera and 5 MP depth sensor.
Vivo V11 Pro's camera performs well enough with basics like daytime, low light, and high-contrast shots, but only in very specific conditions. Host of AI additions here are fairly unnecessary, often serving only to butcher an otherwise decent image. If you want a basic smartphone camera for pretty good shots in most conditions, Vivo V11 Pro is fine. If you want all the extra bells and whistles or need a versatile camera for a variety of tricky shots, this is sadly not the phone for you. To make things better, however, in main camera settings, you can switch to 24MP, making me think Vivo is using interpolation to bump resolution without adding any extra detail. On a positive side, I was really impressed by HDR mode on Vivo V11 Pro. It didn't overdo results, nicely balancing areas of deep shadow and brightness without giving it telltale HDR look. In fact, camera's HDR was its biggest standout for me. Daytime shots are generally pretty good, but you'll need to stick with primary camera.
Phone has a 25MP front-facing camera and it just adds too much noise, to make resulting photos worthwhile. I very quickly gave up on it for selfies because shots it took were grainy and lacked sharpness. On video front, you can only shoot 1080p at 30 fps which is quite disappointing, and with no stabilization available, resulting footage comes out quite shaky.
Low light and night-time photography was a mixed bag. Given a static subject and sufficiently steady hands, Vivo V11 Pro can capture some good-looking images. Add a person or moving subject to scene and image is noticeably worse. Vivo V11 Pro doesn't crush blacks as much as phones like Huawei P20, so expect a lot of noise in the dark. Blown-out highlights in things like street lights were a problem at night too, which is a shame considering how well phone handles dynamic range in daytime. Panorama stitching is very spotty, with blurry stitching points and general fuzziness across image. Same goes for basically all of "AI" camera features. Lighting effects are pretty cheesy and not terribly well done. Monochrome background effect worked well, but color added to faces in foreground throws things off.
Background blur in portrait mode shots still looks too artificial, and edge detection is just as bad here as most phones, especially around hair. If you really like portrait mode shots, you'll probably be able to live with it, but it's far from convincing. AI beauty modes have never been my cup of tea, and that hasn't changed with Vivo V11 Pro. However, they offer a huge range of reality-bending tweaks here, from position and size of your nose and eyes, to length of your chin, width of your face, and your skin tone. Lastly, Vivo has also added Apple iPhone X-like Animoji feature on Vivo V11 Pro, calling it Funmoji. It can be accessed from default TouchPal keyboard. Its implementation isn't done quite well, and it fails to detect facial expressions properly, but is better than what Asus and some other companies have tried
Overall, with a heavy heart I have to admit that Vivo V11 Pro doesn't match up camera performance of phones like Huawei Honor Play or Oppo F9, which are prices in same range as Vivo V11 Pro. It still is a good camera, however, for most casual phones users won't mind drawbacks with Vivo V11 Pro's cameras.