“Make it luxurious” is not a brief. A useful prompt works more like a compact shot list: it states what must remain unchanged, what the image is for and from which point of view the product is seen.
Template
Product: [what exactly are we showing] Goal: [product page / advertising / social] Camera: [front / 3/4 / eye level / focal length] Lighting: [soft studio / daylight / contrast] Environment: [specific place and materials] Colours: [palette] Do not change: [geometry, logo, number of elements, proportions] Frame: [1:1 / 4:5 / 16:9 + space for copy] Control: [list of details to verify]
The most important line: “Do not change”
For a commercial product this is often more important than the style description. List structural elements, RAL colours, the number of shelves, handle type, logo position and anything else that must not be “improved”.
A prompt does not replace references
Attach product photographs, drawings, CAD, material references and a context image. Text describes the intention; references protect reality.
If you need a finished product scene rather than prompt experiments, see the service scope.