Realistic Kids Go-Kart Composite

I have separate, high-resolution photos of my children and their actual go-kart and I’d like them blended into one seamless, realistic image set on a race-track backdrop. The final piece should look as if it were captured in a single shot—consistent lighting, shadows, colour grading and perspective all aligned so nothing feels “pasted on.”

You will receive:
• Two individual portraits (head-to-toe) of the kids shot outdoors in decent light
• A clear photo of the go-kart from a similar angle

What I need back:
• A print-ready composite (minimum 4000 px on the long edge, 300 dpi) in JPEG or PNG
• A layered PSD or TIFF so I can make minor tweaks later if needed

Please use non-destructive editing in Photoshop or a comparable tool, keep the skin tones true to life, and ensure the tyres, reflections and track surface interact naturally. If any extra stock elements are required for the race-track background, let me know before purchase so I can approve.

Let me see a quick low-res proof for feedback on positioning and colour balance, then proceed to the final polish and export.