Denim has a vocabulary problem. Mid-rise, high-rise, straight, tapered, relaxed — the words are precise and they mean nothing to most shoppers until they see the garment on a body. Two pairs described identically can sit completely differently on the same person.
What the try-on shows
Where the waistband actually lands on the shopper, how the leg falls from the hip, what the wash looks like at their scale. Rise in particular is a body-relative property: "high-rise" is a fact about a garment and a question about a person.
Be careful what you claim
Denim is the category where the temptation to over-promise is strongest, and it is the wrong one to give in to. The result is a generated image. It is not evidence that a size 30 fits, and a shopper who reads it as such and orders wrong has had a worse experience than if you had shown them nothing.
Say what it is on the page: a look, not a fitting. It reduces the "this isn't the shape I thought" return. It does not reduce the "wrong size" one, and no image model does.
Getting good results
Full-length photographs, again — the whole point is where the hem lands, and a photo cropped at the thigh cannot show it. A straight-on standing pose reads better than a seated or three-quarter one.
Wash and distressing are pattern detail, and pattern detail is the first thing to soften. A solid indigo reproduces more faithfully than a heavily distressed vintage wash with specific whiskering. If your range is built on distinctive washes, keep the product photograph prominent.