
This is gonna be controversial and I do not mean it to be hurtful I am genuinely so sorry if it is but I don’t think you look obese at certain angles, you simply are overweight in reality and you only look skinny at certain angles. BMI is stupid tho and plenty of medically obese folks are much more active and healthier than skinny folks, as long as you exercise and eat right don’t worry about it. But if you’re not doing those things, time to start!
Different poses/movements affect how your organs and “fat” position themselves. Top left your arms are raised which stretches and narrows your stomach. Top right your arms are in the forefront and you’re slouching slightly so you look bigger. That plus the angles plus the clothes (like others said) = you look “bigger” in some pictures than others.