AI Image Merging & Background Edit

I have a set of photographs that need to be combined into seamless composites. For each final image, I want several source shots (well over five per composition) merged convincingly, with distracting objects either removed or new elements added where it improves the scene. A fresh background must replace the original so the viewer never suspects the swap.

Here’s what matters to me:
• Clean cut-outs and masking—no leftover edges or halos.
• Colour, lighting and perspective matched across all inserted or removed objects so everything feels shot in one take.
• Full-resolution, layered PSDs (or equivalent) alongside web-ready JPG/PNG exports.

You are free to work in the AI toolchain you prefer—Photoshop Generative Fill, Stable Diffusion, DALL-E, or similar—as long as the output meets professional photographic standards and can withstand print-size inspection.

When you reply, please show:
1. A before/after composite you created that involved heavy object removal or addition.
2. Your typical turnaround time for a set of six composites.
3. Any constraints on image dimensions or formats I should know up front.

I will supply the raw images and brief for each scene as soon as we start.