Insert Product Into Photo

I have a single photograph that needs a realistic product added to it. I will supply the background image and clear instructions on where and how the item should appear; you handle the compositing so it looks as if the product was there when the shot was taken. Matching lighting, shadows, reflections, colour grading and overall perspective are essential—no obvious cut-and-paste edges or mismatched tones.

Please deliver:
• A high-resolution JPEG or PNG ready for web/social use
• The layered PSD (or equivalent) so I can tweak elements later if needed

Adobe Photoshop, Lightroom or comparable professional tools are expected. If you can turn this around quickly while keeping the final result visually seamless, let’s get started right away.