Modern Abstract Koi Mural Design wallpaper

I’m looking for a custom-designed wallpaper mural for an irregular stairwell wall with overall dimensions of 8,550 × 5,550 mm. The artwork will be printed as wallpaper and should create a striking, modern-abstract koi feature. Your task is to expand this artwork—matching style, brushwork, and colour relationships—so the final piece covers the entire surface seamlessly, with no obvious repeats or tiled edges.

Acceptance
The design has to look continuous when mapped over the provided elevations; any joins must be invisible at real-world viewing distance. Colours, line weight and texturing should remain faithful to the supplied sample while clearly extending the composition.

If you’re comfortable creating large-format artwork in Photoshop, Illustrator or an equivalent tool and have experience preparing murals or exhibition graphics, I’d love to see a few examples of similar scale projects you’ve handled.