A perfect butt is rare! Due to different beauty ideals, some prefer to have smaller buttocks and some larger. Either can be achieved with liposuction or liposuction with fat transfer. If you ask any two given people what their idea of the ideal butt, they would likely have different answers.
Depending on what you want, we can help you get there! It is best, though, to take a look at your own butt and think of what you would like to be different, i.e. a little more volume up here, less on the sides/hips, more outward projection there, etc. Removing fat from the buttocks is not done in a general manner, it must be done to achieve the best resulting shape, not just decrease volume.
Similarly, if you’d like more volume, then it should be placed in the way that gives you the best shape. Buttock augmentation is achieved with fat transfer, i.e. moving fat from an area where you’d like less and moving it into the buttocks. This is a safe and effective way to augment the butt using a filler made from your own body.
There are simply no other materials approved for augmentation of the buttocks, other than your own fat. Non-invasive fat reduction has not yet been able to address the buttock area, so this is an area where liposuction is still the procedure of choice!